Fix for openstack-725: Fetch the routes before updating the router and then use it for comparing with the new routes. Closes-Bug: openstack-725
Fix for openstack-725:
Fetch the routes before updating the router and then use it for
comparing with the new routes.
Closes-Bug: openstack-725

Change-Id: I0575aaff3e59aadf5235e6332f9c0f92fe5534a4

naveensan1/nuage-openstack-neutron,nuagenetworks/nuage-openstack-neutron,nuagenetworks/nuage-openstack-neutron,naveensan1/nuage-openstack-neutron