Clear entries in Cisco N1KV specific tables on rollback

During rollback operations, resources are cleaned up from neutron
database but leaves a few stale entries in the n1kv specific tables.
This change addresses the proper clean up of tables. i.e. VLAN/VXLAN
allocation tables, profile binding and vm network table.

Change-Id: I7a09d34f3a9dee0a43b76c5d781ee9eb9938953a
Closes-bug: #1336596
Merge "Clear entries in Cisco N1KV specific tables on rollback"