Fix for OPENSTACK-1113
Fix for OPENSTACK-1113

Removed join and with that the troubling group_by from the queries.

Closes-Bug: OPENSTACK-1113

Change-Id: Ie4f13d7e39a58621e547d9d513ead6d4feda3271

naveensan1/nuage-openstack-neutron,nuagenetworks/nuage-openstack-neutron,nuagenetworks/nuage-openstack-neutron,naveensan1/nuage-openstack-neutron