'Shows details for a router.
For a full list of available parameters, please refer to the official
API reference:
http://developer.openstack.org/api-ref/networking/v2/index.html#show-router-details'

def show_router(self, router_id, **fields):

    uri = ('/routers/%s' % router_id)
    return self.show_resource(uri, **fields)
