Avoid constructing a RouterInfo object to get namespace name
Avoid constructing a RouterInfo object to get namespace name

Constructing a RouterInfo object just for a string concatenation is
inefficient and adds more dependence on the class which needs
refactoring.

Change-Id: Ibaf369d6ebe9285a0c845802def59bfa26ac0fd5

dougwig/x-neutron-vpnaas,citrix-openstack-build/neutron-vpnaas,openstack/neutron-vpnaas,openstack/neutron-vpnaas