MB-8972: fixed launch of rebalance
MB-8972: fixed launch of rebalance

Change-Id: I77055eb9af6d29103cb3fb6ae4aef9e5d02afa01
Reviewed-on: http://review.couchbase.org/29876
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

mschoch/ns_server,nimishzynga/ns_server,vzasade/ns_server,ceejatec/ns_server,t3rm1n4l/ns_server,vzasade/ns_server,nimishzynga/ns_server,nimishzynga/ns_server,membase/ns_server,membase/ns_server,mschoch/ns_server,mschoch/ns_server,mschoch/ns_server,t3rm1n4l/ns_server,daverigby/ns_server,vzasade/ns_server,nimishzynga/ns_server,vzasade/ns_server,t3rm1n4l/ns_server,membase/ns_server,nimishzynga/ns_server,membase/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,membase/ns_server,daverigby/ns_server,ceejatec/ns_server,mschoch/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,ceejatec/ns_server,daverigby/ns_server,daverigby/ns_server,nimishzynga/ns_server,membase/ns_server,mschoch/ns_server,ceejatec/ns_server,daverigby/ns_server