bug 7781 update vlan bindings and tunnel ips
1) when the vlan bindings is deleted in the device , the same thing is not
deleted in operational datastore because the port to be updated is not
searched properly.
2) When the tunnel ip is updated, as the physical switch is merged the
tunnel ips child is appened. Excluded the tunnel ips from physical switch
merge operation and adding and removing them seperately.
Change-Id: I64004638a6ce5031fd0f15fad3586f8c84f869db
Signed-off-by: K.V Suneelu Verma <k.v.suneelu.verma@ericsson.com>