Starting with 1.1, for in-network services, we have vrf assign rules to direct traffic to the service routing instances. But for static route, we were still importing the routes into the primary routing instance. We need to import them into the service routing instance so that the return traffic can be sent correctly.

Change-Id: I830ed5ff6476ae8c166f1fd78127a94c4700d05d
Merge "Starting with 1.1, for in-network services, we have vrf assign rules to direct traffic to the service routing instances. But for static route, we were still importing the routes into the primary routing instance. We need to import them into the service routing instance so that the return traffic can be sent correctly."