Fabric: added optional vrouter cmd line arguments for supervisor-vrouter
Fabric: added optional vrouter cmd line arguments for supervisor-vrouter

Added following arguments
"vr_mpls_labels, vr_nexthops, vr_vrfs, vr_bridge_entries"
 parameters to
"/etc/contrail/supervisord_vrouter_files/contrail-vrouter-dpdk.ini"

You can set the arguments in testbed file.

example:

env.vrouter_module_params = {
     host4:{'mpls_labels':'131072', 'nexthops':'131072', 'vrfs':'65536', 'macs':'262144'},
     host5:{'mpls_labels':'131072', 'nexthops':'131072', 'vrfs':'65536', 'macs':'262144'}
}

Closes-bug: 1498072
Change-Id: I39fd4cbfacb320761dcb9e57713189c6dbe9887e

Juniper/contrail-fabric-utils,Juniper/contrail-fabric-utils