ML2: use neutron-lib for PORT_STATUS_ACTIVE
ML2: use neutron-lib for PORT_STATUS_ACTIVE

TrivialFix

Change-Id: I0a7dcb73ab1bb51aeda87520c117b6adecd3be30
Closes-bug: #1586780

noironetworks/neutron,igor-toga/local-snat,openstack/neutron,eayunstack/neutron,huntxu/neutron,igor-toga/local-snat,openstack/neutron,bigswitch/neutron,huntxu/neutron,sebrandon1/neutron,mahak/neutron,mahak/neutron,bigswitch/neutron,mahak/neutron,noironetworks/neutron,sebrandon1/neutron,cloudbase/neutron,eayunstack/neutron,openstack/neutron,cloudbase/neutron