Do not set up links among networks connected to a router. Route exchange happens by configuring router's route target on each of the routing instance.

Change-Id: Id6a237b7e283b8c49d71e82df954eb2e444aecd1
Closes-Bug: 1364674
Merge "Do not set up links among networks connected to a router. Route exchange happens by configuring router's route target on each of the routing instance."