replaced dcsh --pool with --collector and use zminion

Part 2 of 2 of TA22292:
https://rally1.rallydev.com/#/12213835864d/detail/task/21187103929

Depends on https://github.com/zenoss/platform-build/pull/322

DEMO - attach to zope and send commands to zminion on localhost collector:
```
# plu@plu-9: serviced service attach zope su - zenoss
Last login: Wed Sep  3 19:41:17 BST 2014
(zenoss)[zenoss@19b83ce6938c ~]$ dcsh 'uname -a'

Collector=localhost       StdOut/Stderr
-----------------------------------------------------------------
Linux aafc1438cf34 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
 I0903 18:41:37.691732 22370 main.go:85] waiting for response for zminion-return-5932a0b8-8d8e-90e8-8bf4-4788b2fd6d54

-----------------------------------------------------------------
(zenoss)[zenoss@19b83ce6938c ~]$ dcsh 'ps -wwef'

Collector=localhost       StdOut/Stderr
-----------------------------------------------------------------
UID        PID  PPID  C STIME TTY          TIME CMD
root         1     0  0 18:17 ?        00:00:12 /serviced/serviced service proxy e72z5tb6x1jgpdc65liamfr9v 0 su - zenoss -c '/opt/zenoss/bin/zminion --minion-name zminion_localhost serve'
root        16     1  0 18:17 ?        00:00:00 su - zenoss -c /opt/zenoss/bin/zminion --minion-name zminion_localhost serve
zenoss      17    16  0 18:17 ?        00:00:01 /opt/zenoss/bin/zminion --minion-name zminion_localhost serve
root      4747     1  0 18:41 ?        00:00:00 sh -c /tmp/zenhub_answering245804888
root      4748  4747  0 18:41 ?        00:00:00 sh -c echo hi && sleep 5
root      4749  4747  0 18:41 ?        00:00:00 nc 127.0.0.1 8789
root      4750  4747  0 18:41 ?        00:00:00 grep -q pb
root      4751  4748  0 18:41 ?        00:00:00 sleep 5
zenoss    4761    17  0 18:41 ?        00:00:00 ps -wwef
 I0903 18:41:46.439075 22517 main.go:85] waiting for response for zminion-return-c0fd9ab3-cef6-fd09-11dd-de74b8c1b53e

-----------------------------------------------------------------
(zenoss)[zenoss@19b83ce6938c ~]$ dcsh binbaz

Collector=localhost       StdOut/Stderr
-----------------------------------------------------------------
 I0903 18:41:56.249798 22691 main.go:85] waiting for response for zminion-return-23d2c2b7-6f54-c4bc-3846-f3413e9c3be9
/bin/sh: binbaz: command not found

-----------------------------------------------------------------
(zenoss)[zenoss@19b83ce6938c ~]$ dcsh --help
Usage: RunCommand.py [options]

Options:
  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -C CONFIGFILE, --configfile=CONFIGFILE
                        Use an alternate configuration file
  --genconf             Generate a template configuration file
  --genxmltable         Generate a Docbook table showing command-line
                        switches.
  --genxmlconfigs       Generate an XML file containing command-line switches.
  --collector=COLLECTOR_ID
                        Name of specific collector on which to run the command
  --timeout=TIMEOUT     Kill the process after this many seconds.

  Logging Options:
    -v LOGSEVERITY, --logseverity=LOGSEVERITY
                        Logging severity threshold
    --logpath=LOGPATH   Override the default logging path; default
                        $ZENHOME/log
    --maxlogsize=MAXLOGKILOBYTES
                        Max size of log file in KB; default 10240
    --maxbackuplogs=MAXBACKUPLOGS
                        Max number of back up log files; default 3

  ZODB Options:
    ZODB connection options and MySQL Adapter options.

    -R DATAROOT, --zodb-dataroot=DATAROOT
                        root object for data load (i.e. /zport/dmd)
    --zodb-cachesize=ZODB_CACHESIZE
                        in memory cachesize default: 1000
    --zodb-host=ZODB_HOST
                        hostname of the MySQL server for ZODB
    --zodb-port=ZODB_PORT
                        port of the MySQL server for ZODB
    --zodb-user=ZODB_USER
                        user of the MySQL server for ZODB
    --zodb-password=ZODB_PASSWORD
                        password of the MySQL server for ZODB
    --zodb-db=ZODB_DB   Name of database for MySQL object store
    --zodb-socket=ZODB_SOCKET
                        Name of socket file for MySQL server connection if
                        host is localhost
    --zodb-cacheservers=ZODB_CACHESERVERS
                        memcached servers to use for object cache (eg.
                        127.0.0.1:11211)
    --zodb-poll-interval=ZODB_POLL_INTERVAL
                        Defer polling the database for the specified maximum
                        time interval, in seconds. This will default to 60
                        only if --zodb-cacheservers is set.
    --zodb-commit-lock-timeout=ZODB_COMMIT_LOCK_TIMEOUT
                        Specify the number of seconds a database connection
                        will wait to acquire a database 'commit' lock before
                        failing (defaults to 30 seconds if not specified).
(zenoss)[zenoss@19b83ce6938c ~]$ 

```

Required services:
```
# plu@plu-9: serviced service status
NAME			ID				STATUS		UPTIME			HOST	DOCKER_ID	IN_SYNC
└─Zenoss.core		3s7hkpp803wt6jtyg5o5pck7t	Stopped								
  ├─MySQL		2j25zgzdvez0r3bnikuv46yr6	Running		26m51.568282273s	plu-9	1dc01eaea06b	Y
  ├─zeneventserver	3391ia6goj7r4p2oj6clzo3px	Running		26m44.295008319s	plu-9	bfe8f1140dfe	Y
  ├─redis		93e6389b6d6hkbabt6cloi1fa	Running		26m59.875157757s	plu-9	eccbbe250c15	Y
  ├─RabbitMQ		at3fybjtarovpbqy6ih7ocp0n	Running		26m45.835643776s	plu-9	180b5b5cefd2	Y
  ├─localhost		bi1b6h5mqrnqg5h897jw44elq									
  │ ├─zenhub		64vx1azuyqv2six9tt79n47q7	Running		26m44.475346444s	plu-9	c07117097b2a	Y
  │ └─localhost		d06n26qoxn9xxlbin6ujxevpo									
  │   ├─zminion		e72z5tb6x1jgpdc65liamfr9v	Running		26m11.771032219s	plu-9	aafc1438cf34	Y
  ├─Zope		cwc58bg1wa4coso7bx26l8mq3	Running		26m39.187058384s	plu-9	19b83ce6938c	Y
```