Multiple consumers for PLUGIN topic
Multiple consumers for PLUGIN topic

Fix avoids additional consumer creation for PLUGIN topic with insufficient
endpoints when REPORTS topic is not present or missing.

Change-Id: I189c3b308d7d5cfd055a19e4bd664b25b111f890

FrankDuan/df_code,openstack/dragonflow,FrankDuan/df_code,openstack/dragonflow,FrankDuan/df_code,openstack/dragonflow