contrail-config-openstack: Added missing dependency on neutron libs

contrail-config-openstack needs now neutron.common and neutron.api.v2
libs.

https://github.com/Juniper/contrail-controller/blob/570a84f6586bcc7971080056f3e43503f8c6a870/src/config/vnc_openstack/vnc_openstack/neutron_plugin_db.py#L18-L20

Change-Id: I626e41d057ca922966a843fff314179a3a36e1c0
Merge "contrail-config-openstack: Added missing dependency on neutron libs"