OpenDaylight Networking SFC Port Pair Group REST APIs

OpenDaylight Networking SFC Port Pair Group REST APIs

This patch defines REST API's in Neutron Northbound project
for the networking sfc port pair group APIs and implementation of
the translation code to convert these REST API data to the
networking-sfc port pair group Yang models. These Neutron
Northbound REST API's are defined based on the OpenStack
Networking-SFC Port Pair Group APIs available at following URL.

http://docs.openstack.org/developer/networking-sfc/api.html#rest-api

Signed-off-by: Anil Vishnoi <vishnoianil@gmail.com>
Change-Id: Ib25544b711873983be7733ec552328220fd8a85d