Avoid allow_all PG creation for hw vports
Avoid allow_all PG creation for hw vports

Avoid unnecessary allow_all PG creation for hw vports
as it is default behaviour of the Nuage tor switches.

Change-Id: I3e5e183694de1d3957dd2b7274e01451d5127128

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