Remove use_namespaces from RouterInfo Property

The use_namespaces property is a property of the agent, not the
router.  The router doesn't need to know if namespaces are in use by
the agent.

Change-Id: I50a1069fc654eeaafaa4098d926ae9e96e5d400f
Imported Translations from Transifex

For more information about this automatic import see:
https://wiki.openstack.org/wiki/Translations/Infrastructure

Change-Id: I1e8aad9a1eb480438c4221b51b46e93485ee2d13
Merge "Remove use_namespaces from RouterInfo Property"