General practive of representing the rabbit vhost
General practive of representing the rabbit vhost

is with / prefix, Eg: '/test', So setting '/' as default
caluse for rabbit_vhost and framing url with proper
vhost path.

Change-Id: I5c1cffffa2e5a32c96b87441e675f30098b7170c
Partial-Bug: 1687417

eonpatapon/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller