Delete l2 receive route on VMI delete.
Delete l2 receive route on VMI delete.

Dont depend on bridging mode change.

Change-Id: I4c6db32b01543fd1505bb3c02a453512cb413710
Closes-bug: #1605764

codilime/contrail-controller,codilime/contrail-controller,codilime/contrail-controller,codilime/contrail-controller,codilime/contrail-controller,codilime/contrail-controller