replace gobrpc with jsonrpc encoding

history of commits: https://github.com/control-center/serviced/pull/979


DEMO1 - serviced service status doesn't hang:
```
# plu@plu-9: serviced service status
NAME			ID				STATUS		UPTIME			HOST	DOCKER_ID	IN_SYNC
└─Zenoss.core		5oqhbuu2g7734dadb4j1xmdze	Running		5m14.690632782s		plu-9	2ac909878430	Y
  ├─RabbitMQ		1b2g527m5h1qy0lqdyxom8nn0	Running		4m33.680346504s		plu-9	064541ca058f	Y
  ├─MetricConsumer	1ry2dp2af11drttik5ksda561	Running		5m10.340320653s		plu-9	8cd10e6f4cf5	Y
  ├─MetricShipper	1sckrkoyyvf26uir6yb46ugyw	Running		5m10.427868083s		plu-9	68cbfb7a1470	Y
  ├─opentsdb		38vw89uzmz9paell3x394wiy7	Running		5m14.409395421s		plu-9	0459b6d30dfe	Y
  ├─zenjobs		49itsk05ihb1jfmbldxzoz6z4	Running		4m49.568641438s		plu-9	ab94b4f3bb4f	Y
  ├─MySQL		4evjy9vothpketh03siciowyz	Running		4m39.841022501s		plu-9	c0b7c0f0a7de	Y
  ├─CentralQuery	6634ujiheixdnfxusd5hoby5q	Running		5m10.355504057s		plu-9	8096ca7820ae	Y
  ├─redis		6rzqw7zb9sag0xlxq8164m6h2	Running		5m10.35120267s		plu-9	cb53c930eaf6	Y
  ├─zeneventd		8ctr947glgwh0js5we7rusdba	Running		5m10.376967652s		plu-9	4eaacafdb70a	Y
  ├─zeneventserver	9k1jn2ykhhaa8y8gt3vubxts	Running		4m48.661208663s		plu-9	d0b07f846719	Y
  ├─localhost		akwov4pokpc01tl27eqkvsvi6									
  │ ├─localhost		130x826p33fwvftf5t15i4ur1									
  │ │ ├─zenperfsnmp	18flvv1nzbz75b72ghkklrt4q	Running		5m12.500796656s		plu-9	668a1c155a7a	Y
  │ │ ├─zensyslog	1wy0an8onlrism9wcbz51z0y5	Running		5m9.913284523s		plu-9	38b413515da2	Y
  │ │ ├─zenstatus	2zjfn3h3vgf4xe78e6ddw2097	Running		5m10.181848258s		plu-9	e7584731296b	Y
  │ │ ├─zminion		6rqklzt2fibhmiln54dtddgyc	Running		5m10.219182243s		plu-9	5a2af17eaa0d	Y
  │ │ ├─zencommand	7u3eaba8q11u4m43hnqa6bce7	Running		5m12.509396516s		plu-9	3e1560166af3	Y
  │ │ ├─MetricShipper	82nkz53zxoib6sl9qnlnmdplp	Running		5m10.212899493s		plu-9	f8809de629a6	Y
  │ │ ├─zenmodeler	b44gui15je2ls4f8nfhtkesvg	Running		5m13.4504367s		plu-9	4c0ca129f62c	Y
  │ │ ├─zenjmx		bh5x7cgncrefn3xsqgb7kfxlg	Running		5m12.610698886s		plu-9	82c35d9deec5	Y
  │ │ ├─collectorredis	bvto9k1qgr1ur3s4fkrybrivo	Running		5m12.406867135s		plu-9	5b87f78e3870	Y
  │ │ ├─zenprocess	bxhcan4vz5p4s0p5gomaindne	Running		5m12.556727039s		plu-9	453afc11e7ab	Y
  │ │ ├─zenpython	e4u3okukqikuidqepr52wqrot	Running		5m12.413598723s		plu-9	651c4bed496a	Y
  │ │ ├─zentrap		ew26u0qdgk94jkdyznkmidpe8	Running		5m10.417902595s		plu-9	1b0c4275eca4	Y
  │ │ └─zenping		f0ker8fnkn7vzf7nciiduspum	Running		5m13.433657616s		plu-9	54e284716a48	Y
  │ └─zenhub		67g74qjml4hwc4bf9cgrom0h1	Running		5m10.345948979s		plu-9	79212db60ac1	Y
  ├─HBase		az3db511rh7vf3wasanwtixs9									
  │ ├─RegionServer	18cc33mqirxien0p1rlp4h4ml	Running		5m5.19056566s		plu-9	3a67752f78cb	Y
  │ ├─HMaster		745k1v6xdl2qp4lv8du55x46z	Running		4m59.16334598s		plu-9	33726f302c36	Y
  │ └─ZooKeeper		7zir7343thhyonjyoui17dgtw	Running		4m52.727296242s		plu-9	536ebadfdc45	Y
  ├─zenactiond		e3ar7sxsd58jcyrkvdzyybkq	Running		5m10.365700139s		plu-9	33183fa61d6f	Y
  └─Zope		el1h82ddxl6rutah1rd1hkp1w	Running		5m9.733642511s		plu-9	f58803c45d26	Y
```