Add logging to debug oslo.messaging failure
Add logging to debug oslo.messaging failure

It looks like recent changes to oslo.messaging master are conflicting
with changes in neutron master with the way RPC services are started
when the rpc_workers value == 0.

Change-Id: Iea2197ad0ea9ceb9a2a850a9e03e53b4b39ca288

jumpojoy/neutron,barnsnake351/neutron,wolverineav/neutron,apporc/neutron,silenci/neutron,adelina-t/neutron,javaos74/neutron,neoareslinux/neutron,jumpojoy/neutron,SamYaple/neutron,wolverineav/neutron,sasukeh/neutron,igor-toga/local-snat,sebrandon1/neutron,eayunstack/neutron,huntxu/neutron,JianyuWang/neutron,openstack/neutron,mahak/neutron,yanheven/neutron,glove747/liberty-neutron,shahbazn/neutron,mahak/neutron,glove747/liberty-neutron,MaximNevrov/neutron,takeshineshiro/neutron,openstack/neutron,openstack/neutron,bigswitch/neutron,SamYaple/neutron,mattt416/neutron,apporc/neutron,cloudbase/neutron,javaos74/neutron,dims/neutron,neoareslinux/neutron,bigswitch/neutron,swdream/neutron,klmitch/neutron,igor-toga/local-snat,cloudbase/neutron,eayunstack/neutron,mahak/neutron,noironetworks/neutron,chitr/neutron,huntxu/neutron,dims/neutron,mmnelemane/neutron,asgard-lab/neutron,mmnelemane/neutron,adelina-t/neutron,noironetworks/neutron,vivekanand1101/neutron,skyddv/neutron,dhanunjaya/neutron,shahbazn/neutron,vivekanand1101/neutron,swdream/neutron,klmitch/neutron,skyddv/neutron,JianyuWang/neutron,MaximNevrov/neutron,sebrandon1/neutron,yanheven/neutron,dhanunjaya/neutron,takeshineshiro/neutron,barnsnake351/neutron,chitr/neutron,silenci/neutron,sasukeh/neutron,asgard-lab/neutron,mattt416/neutron