allow attaching with matching suffix of running service path

DEMO:
```
# plu@plu-9: serviced service status
NAME			ID				STATUS		UPTIME			HOST	IN_SYNC		DOCKER_ID
└─Zenoss.core.full	9lw9wquab69mqudjsbievtxj3	Stopped								
  ├─MySQL		31f80k2bu8ppdluc5xlvnv8t0	Stopped								
  ├─MetricShipper	3spqcfvd4gabwqurgiyhdc1fa	Running		5m4.369141395s		plu-9	Y		6ae03992348e
  ├─RabbitMQ		4dzv6tthrmxkic80yh787tzrn	Stopped								
  ├─Zauth		5jmwacgayywhtsvc8xyvp2xvb	Stopped								
  ├─Zope/0		6ikahx9fcvfiqvskbgp9pgvyh/0	Running		4m18.282965613s		plu-9	Y		ff8eee51d00c
  ├─Zope/1		6ikahx9fcvfiqvskbgp9pgvyh/1	Running		4m14.384931115s		plu-9	Y		285f51c87188
  ├─zenjobs		6laglm4vofhg683egv6odivhg	Stopped								
  ├─opentsdb		6rieq78w5uorrz5cw0giqbr8g									
  │ ├─reader		5rpqnqrfz2t5uis1bj3snyb44	Stopped								
  │ └─writer		dgrkmhajuiic6tpzfloluedqj	Stopped								
  ├─localhost		7fb7ftngwkgxpelzzirrt6b0z									
  │ ├─localhost		8w2kbqealtntwwi0w8lom4yct									
  │ │ ├─zenperfsnmp	4mjn7m2cn9mwvcp5cqqdxyeu5	Stopped								
  │ │ ├─zminion		5ke7feervl2yz2fs63cals53k	Stopped								
  │ │ ├─zenprocess	70waod4s3az78hhvr6ju62zfr	Stopped								
  │ │ ├─zenmodeler	7jexzmfjdpvv6lsfzn22geioc	Stopped								
  │ │ ├─zencommand	8cy07m9e1gwzk6qw6robytnde	Stopped								
  │ │ ├─zensyslog	8i7qjvuxcrw6y3okx0q9tkpvn	Stopped								
  │ │ ├─zentrap		8zxivsy3y7llunecmmittw001	Stopped								
  │ │ ├─zenstatus	9h8qsd8jp4rr9ll864sywlzvv	Stopped								
  │ │ ├─collectorredis	9zfxq4o3sdl45jolcfez5mkm4	Stopped								
  │ │ ├─MetricShipper	ay7w7c9jyijxsareyanc3cvbe	Running		5m9.943620984s		plu-9	Y		166c2ecc72c8
  │ │ ├─zenpython	b9is5e7625jfgbft9v9hjpshf	Stopped								
  │ │ ├─zenping		bgqr71qqykitmiu6xj8yayh4c	Running		8m36.381655505s		plu-9	Y		c159a08ef947
  │ │ └─zenjmx		ci4j7devj0k59nv2mjf3my4fx	Stopped								
  │ └─zenhub		f0br0vyrkjlhvlehw4ihftk1	Running		4m46.695307716s		plu-9	Y		d70ff29e03d6
  ├─CentralQuery	7hzbbawdfxv7b5lwf5jqnaqdr	Stopped								
  ├─zenactiond		7j361cfa95a8hqurbaxp9whqm	Stopped								
  ├─zeneventserver	7muhjrpm6239a4uv5ccmi3a0j	Stopped								
  ├─redis		7uluoqovnqx8ob5gwlblqygxs	Running		4m25.466787591s		plu-9	Y		1d1331dab80b
  ├─zeneventd		by3r9wil46pqydf5501gstzgt	Stopped								
  ├─memcached		cs51n1pjx7b6bjj0ucuxln1ct	Stopped								
  ├─HBase		exvhtvoyrygcm3f417j8u70k2									
  │ ├─RegionServer	4jjpx6avxmsvg3t0tkbthx0iv	Stopped								
  │ ├─ZooKeeper		5w5tdriszr8p4wrvbz1sxbk1g	Stopped								
  │ └─HMaster		boyztikkybw29wux592r7rhg	Running		17.223597282s		plu-9	Y		c90bd991a6de
  └─MetricConsumer	eyfmqbxcbtz27fdfch5kf4idh	Stopped								


# plu@plu-9: serviced service attach hmaster uname -n
localhost
# plu@plu-9: serviced service attach zenhub uname -n
d70ff29e03d6
# plu@plu-9: serviced service attach zenping uname -n
c159a08ef947

# plu@plu-9: serviced service attach metricshipper
NAME		ID				HOST	HOSTIP		DOCKERID	POOL/PATH
MetricShipper	ay7w7c9jyijxsareyanc3cvbe	plu-9	172.17.42.1	166c2ecc72c8	default/zenoss.core.full/localhost/localhost/metricshipper/0
MetricShipper	3spqcfvd4gabwqurgiyhdc1fa	plu-9	172.17.42.1	6ae03992348e	default/zenoss.core.full/metricshipper/0
multiple results found; specify unique item from list
# plu@plu-9: serviced service attach localhost/metricshipper/0 uname -n
166c2ecc72c8
# plu@plu-9: serviced service attach zenoss.core.full/metricshipper/0 uname -n
6ae03992348e

# plu@plu-9: serviced service attach zope
NAME	ID				HOST	HOSTIP		DOCKERID	POOL/PATH
Zope/1	6ikahx9fcvfiqvskbgp9pgvyh/1	plu-9	172.17.42.1	285f51c87188	default/zenoss.core.full/zope/1
Zope/0	6ikahx9fcvfiqvskbgp9pgvyh/0	plu-9	172.17.42.1	ff8eee51d00c	default/zenoss.core.full/zope/0
multiple results found; specify unique item from list
# plu@plu-9: serviced service attach zope/0 uname -n
ff8eee51d00c
# plu@plu-9: serviced service attach zope/1 uname -n
285f51c87188
```

DEMO2 - show full paths of running services:
```
# plu@plu-9: serviced service status
NAME			ID				STATUS		UPTIME			HOST	IN_SYNC		DOCKER_ID
└─Zenoss.core.full	9lw9wquab69mqudjsbievtxj3	Stopped								
  ├─MySQL		31f80k2bu8ppdluc5xlvnv8t0	Stopped								
  ├─MetricShipper	3spqcfvd4gabwqurgiyhdc1fa	Running		54.936946175s		plu-9	Y		6ae03992348e
  ├─RabbitMQ		4dzv6tthrmxkic80yh787tzrn	Stopped								
  ├─Zauth		5jmwacgayywhtsvc8xyvp2xvb	Stopped								
  ├─Zope/0		6ikahx9fcvfiqvskbgp9pgvyh/0	Running		8.864584779s		plu-9	Y		ff8eee51d00c
  ├─Zope/1		6ikahx9fcvfiqvskbgp9pgvyh/1	Running		4.966550024s		plu-9	Y		285f51c87188
  ├─zenjobs		6laglm4vofhg683egv6odivhg	Stopped								
  ├─opentsdb		6rieq78w5uorrz5cw0giqbr8g									
  │ ├─reader		5rpqnqrfz2t5uis1bj3snyb44	Stopped								
  │ └─writer		dgrkmhajuiic6tpzfloluedqj	Stopped								
  ├─localhost		7fb7ftngwkgxpelzzirrt6b0z									
  │ ├─localhost		8w2kbqealtntwwi0w8lom4yct									
  │ │ ├─zenperfsnmp	4mjn7m2cn9mwvcp5cqqdxyeu5	Stopped								
  │ │ ├─zminion		5ke7feervl2yz2fs63cals53k	Stopped								
  │ │ ├─zenprocess	70waod4s3az78hhvr6ju62zfr	Stopped								
  │ │ ├─zenmodeler	7jexzmfjdpvv6lsfzn22geioc	Stopped								
  │ │ ├─zencommand	8cy07m9e1gwzk6qw6robytnde	Stopped								
  │ │ ├─zensyslog	8i7qjvuxcrw6y3okx0q9tkpvn	Stopped								
  │ │ ├─zentrap		8zxivsy3y7llunecmmittw001	Stopped								
  │ │ ├─zenstatus	9h8qsd8jp4rr9ll864sywlzvv	Stopped								
  │ │ ├─collectorredis	9zfxq4o3sdl45jolcfez5mkm4	Stopped								
  │ │ ├─MetricShipper	ay7w7c9jyijxsareyanc3cvbe	Running		1m0.509206656s		plu-9	Y		166c2ecc72c8
  │ │ ├─zenpython	b9is5e7625jfgbft9v9hjpshf	Stopped								
  │ │ ├─zenping		bgqr71qqykitmiu6xj8yayh4c	Running		4m26.928696458s		plu-9	Y		c159a08ef947
  │ │ └─zenjmx		ci4j7devj0k59nv2mjf3my4fx	Stopped								
  │ └─zenhub		f0br0vyrkjlhvlehw4ihftk1	Running		37.239680275s		plu-9	Y		d70ff29e03d6
  ├─CentralQuery	7hzbbawdfxv7b5lwf5jqnaqdr	Stopped								
  ├─zenactiond		7j361cfa95a8hqurbaxp9whqm	Stopped								
  ├─zeneventserver	7muhjrpm6239a4uv5ccmi3a0j	Stopped								
  ├─redis		7uluoqovnqx8ob5gwlblqygxs	Running		16.046376475s		plu-9	Y		1d1331dab80b
  ├─zeneventd		by3r9wil46pqydf5501gstzgt	Stopped								
  ├─memcached		cs51n1pjx7b6bjj0ucuxln1ct	Stopped								
  ├─HBase		exvhtvoyrygcm3f417j8u70k2									
  │ ├─RegionServer	4jjpx6avxmsvg3t0tkbthx0iv	Stopped								
  │ ├─ZooKeeper		5w5tdriszr8p4wrvbz1sxbk1g	Stopped								
  │ └─HMaster		boyztikkybw29wux592r7rhg	Stopped								
  └─MetricConsumer	eyfmqbxcbtz27fdfch5kf4idh	Stopped								

# plu@plu-9: serviced -v=2 service attach zope
I0912 11:10:03.364234 25502 service.go:876] ========= rs:7uluoqovnqx8ob5gwlblqygxs redis  path[cdcg0ep3ew7uqqexqjw0illgz]:zenoss.core.full/redis/0
I0912 11:10:03.364377 25502 service.go:876] ========= rs:bgqr71qqykitmiu6xj8yayh4c zenping  path[9qog4302wqze1bx42nh2dhfkj]:zenoss.core.full/localhost/localhost/zenping/0
I0912 11:10:03.364407 25502 service.go:876] ========= rs:ay7w7c9jyijxsareyanc3cvbe MetricShipper  path[3ctjjggsp33pbcq9l8wu5mw6z]:zenoss.core.full/localhost/localhost/metricshipper/0
I0912 11:10:03.364429 25502 service.go:876] ========= rs:3spqcfvd4gabwqurgiyhdc1fa MetricShipper  path[72jvuxwjr3cmfbkfyk7050i35]:zenoss.core.full/metricshipper/0
I0912 11:10:03.364453 25502 service.go:876] ========= rs:f0br0vyrkjlhvlehw4ihftk1 zenhub  path[drra7lo4ueq3mtia27cfjf125]:zenoss.core.full/localhost/zenhub/0
I0912 11:10:03.364474 25502 service.go:876] ========= rs:6ikahx9fcvfiqvskbgp9pgvyh Zope  path[aqa0f4fzwbijfk9ogmknt9pev]:zenoss.core.full/zope/1
I0912 11:10:03.364495 25502 service.go:876] ========= rs:6ikahx9fcvfiqvskbgp9pgvyh Zope  path[34ojw2yk01e1z2obtdvypuxxg]:zenoss.core.full/zope/0
NAME	ID				HOST	HOSTIP		DOCKERID	POOL/PATH
Zope/1	6ikahx9fcvfiqvskbgp9pgvyh/1	plu-9	172.17.42.1	285f51c87188	default/zenoss.core.full/zope/1
Zope/0	6ikahx9fcvfiqvskbgp9pgvyh/0	plu-9	172.17.42.1	ff8eee51d00c	default/zenoss.core.full/zope/0
multiple results found; specify unique item from list
```

DEMO3 - only zenping service started:
```
# plu@plu-9: serviced service status
NAME			ID				STATUS		UPTIME		HOST	IN_SYNC		DOCKER_ID
└─Zenoss.core.full	9lw9wquab69mqudjsbievtxj3	Stopped							
  ├─MySQL		31f80k2bu8ppdluc5xlvnv8t0	Stopped							
  ├─MetricShipper	3spqcfvd4gabwqurgiyhdc1fa	Stopped							
  ├─RabbitMQ		4dzv6tthrmxkic80yh787tzrn	Stopped							
  ├─Zauth		5jmwacgayywhtsvc8xyvp2xvb	Stopped							
  ├─Zope		6ikahx9fcvfiqvskbgp9pgvyh	Stopped							
  ├─zenjobs		6laglm4vofhg683egv6odivhg	Stopped							
  ├─opentsdb		6rieq78w5uorrz5cw0giqbr8g								
  │ ├─reader		5rpqnqrfz2t5uis1bj3snyb44	Stopped							
  │ └─writer		dgrkmhajuiic6tpzfloluedqj	Stopped							
  ├─localhost		7fb7ftngwkgxpelzzirrt6b0z								
  │ ├─localhost		8w2kbqealtntwwi0w8lom4yct								
  │ │ ├─zenperfsnmp	4mjn7m2cn9mwvcp5cqqdxyeu5	Stopped							
  │ │ ├─zminion		5ke7feervl2yz2fs63cals53k	Stopped							
  │ │ ├─zenprocess	70waod4s3az78hhvr6ju62zfr	Stopped							
  │ │ ├─zenmodeler	7jexzmfjdpvv6lsfzn22geioc	Stopped							
  │ │ ├─zencommand	8cy07m9e1gwzk6qw6robytnde	Stopped							
  │ │ ├─zensyslog	8i7qjvuxcrw6y3okx0q9tkpvn	Stopped							
  │ │ ├─zentrap		8zxivsy3y7llunecmmittw001	Stopped							
  │ │ ├─zenstatus	9h8qsd8jp4rr9ll864sywlzvv	Stopped							
  │ │ ├─collectorredis	9zfxq4o3sdl45jolcfez5mkm4	Stopped							
  │ │ ├─MetricShipper	ay7w7c9jyijxsareyanc3cvbe	Stopped							
  │ │ ├─zenpython	b9is5e7625jfgbft9v9hjpshf	Stopped							
  │ │ ├─zenping		bgqr71qqykitmiu6xj8yayh4c	Running		51.831831559s	plu-9	Y		c159a08ef947
  │ │ └─zenjmx		ci4j7devj0k59nv2mjf3my4fx	Stopped							
  │ └─zenhub		f0br0vyrkjlhvlehw4ihftk1	Stopped							
  ├─CentralQuery	7hzbbawdfxv7b5lwf5jqnaqdr	Stopped							
  ├─zenactiond		7j361cfa95a8hqurbaxp9whqm	Stopped							
  ├─zeneventserver	7muhjrpm6239a4uv5ccmi3a0j	Stopped							
  ├─redis		7uluoqovnqx8ob5gwlblqygxs	Stopped							
  ├─zeneventd		by3r9wil46pqydf5501gstzgt	Stopped							
  ├─memcached		cs51n1pjx7b6bjj0ucuxln1ct	Stopped							
  ├─HBase		exvhtvoyrygcm3f417j8u70k2								
  │ ├─RegionServer	4jjpx6avxmsvg3t0tkbthx0iv	Stopped							
  │ ├─ZooKeeper		5w5tdriszr8p4wrvbz1sxbk1g	Stopped							
  │ └─HMaster		boyztikkybw29wux592r7rhg	Stopped							
  └─MetricConsumer	eyfmqbxcbtz27fdfch5kf4idh	Stopped							
~/src/europa/src/golang/src/github.com/control-center/serviced
# plu@plu-9: serviced -v=2 service attach zenping uname -n
I0912 11:05:54.350788 14753 service.go:876] ========= rs:bgqr71qqykitmiu6xj8yayh4c zenping  path[9qog4302wqze1bx42nh2dhfkj]:zenoss.core.full/localhost/localhost/zenping/0
I0912 11:05:54.355020 14753 nsenter.go:108] attach command for container:c159a08ef947e051e31ba169e3861004340d4f7f61b07d24c72ee5dfa6cd355e command: [/usr/bin/sudo /usr/bin/nsenter -m -u -i -n -p -t 13968 -- uname -n]
I0912 11:05:54.355077 14753 nsenter.go:66] exec command for container:c159a08ef947e051e31ba169e3861004340d4f7f61b07d24c72ee5dfa6cd355e command: [/usr/bin/sudo /usr/bin/nsenter -m -u -i -n -p -t 13968 -- uname -n]
c159a08ef947
```