Intial check of the rabbitmq cluster status may fail, so should warn_only and proceeed to cluster it instead of exiting.
Intial check of the rabbitmq cluster status may fail, so should warn_only and
proceeed to cluster it instead of exiting.

Change-Id: I2ea88c7dc41cc62239fa293a1a76c947a874b32d

Juniper/contrail-fabric-utils,Juniper/contrail-fabric-utils