subnet create and router create commands now gives the ability
to the user to create subnets and routers via neutron cli with
additional attributes nuage_subnet_template and nuage_router_template
respectively. The instantiated subnet and router inherits the properties
of the template that was mentioned in the additional parameters.
Change-Id: Ib73313e840cb35ede89df858baa536aab883efa2
Closes-Bug: #1353112
b1b97dd721