* Return fq_name and policies on network read if contrail_neutron_extensions_enabled knob is turned on
* Add unit tests (runnable in tree) for neutron backend code in vnc_openstack for above
* Reorganize test code to make it re-usable across config services

Change-Id: I6ff1629ea50d2ca821b169c978bdeff02333813b
Merge "* Return fq_name and policies on network read if contrail_neutron_extensions_enabled knob is turned on * Add unit tests (runnable in tree) for neutron backend code in vnc_openstack for above * Reorganize test code to make it re-usable across config services"