Topology: drop patch ports from the managed list
Topology: drop patch ports from the managed list

The topology class does not implement patch handlers, plus, vswitch_impl
code does not even notify on patch port events.

Change-Id: I2ef9d7d0076e40fec708b5c5bc1e7c96cdd794b1

openstack/dragonflow,openstack/dragonflow,openstack/dragonflow