Make test_nova_manage pass with CONF.use_neutron=True by default
Make test_nova_manage pass with CONF.use_neutron=True by default

This just requires enforcing nova-network in the
NetworkCommandsTestCase.

Part of blueprint use-neutron-by-default

Change-Id: I81cfd9386d02f796723a8e56b887b892fd76b600

phenoxim/nova,vmturbo/nova,gooddata/openstack-nova,jianghuaw/nova,vmturbo/nova,gooddata/openstack-nova,hanlind/nova,hanlind/nova,jianghuaw/nova,Juniper/nova,phenoxim/nova,vmturbo/nova,klmitch/nova,rahulunair/nova,klmitch/nova,Juniper/nova,klmitch/nova,gooddata/openstack-nova,Juniper/nova,Juniper/nova,mahak/nova,rahulunair/nova,rajalokan/nova,openstack/nova,mikalstill/nova,jianghuaw/nova,openstack/nova,hanlind/nova,gooddata/openstack-nova,klmitch/nova,rajalokan/nova,mahak/nova,rajalokan/nova,jianghuaw/nova,openstack/nova,rahulunair/nova,rajalokan/nova,mikalstill/nova,mahak/nova,vmturbo/nova,mikalstill/nova