Control_test uses the same port for for several tests which can cause failures

[tiffanyfay]

  * /Users/tjerniga/.gvm/pkgsets/system/global/src/github.com/intelsdi-x/snap/control/control_test.go
  Line 117:
  Expected: nil
  Actual:   'listen tcp 127.0.0.1:8082: bind: address already in use'

time="2016-06-15T23:55:03-07:00" level=info msg="control started" _block=start _module=control
time="2016-06-15T23:55:03-07:00" level=info msg="auto discover path is disabled" _block=start _module=control
time="2016-06-15T23:55:03-07:00" level=error msg="Failed to start control grpc listener" _module=control error="listen tcp 127.0.0.1:8082: bind: address already in use"
time="2016-06-15T23:55:03-07:00" level=info msg="plugin load called" _block=load _module=control
time="2016-06-15T23:55:03-07:00" level=info msg="plugin load called" _block=load-plugin _module=control-plugin-mgr path=snap-collector-mock2