Traffic of trunk with subport is not classified correctly

[Dima Kuznetsov]

When a subport is added, its classification flows overwrite the flows of trunk port.
This happens because classification app receives event on both trunk and subport, and both share the same ofport.

 Trunk classification flow:
 cookie=0x0, duration=9614.115s, table=0, n_packets=0, n_bytes=0, idle_age=9614, priority=200,in_port=6,dl_vlan=3148 actions=load:0xc->NXM_NX_REG6[],load:0x4->OXM_OF_METADATA[],strip_vlan,resubmit(,5)

 Regular classification flow
 cookie=0x0, duration=9565.526s, table=0, n_packets=333102, n_bytes=29460000, idle_age=0, priority=100,in_port=6 actions=load:0xc->NXM_NX_REG6[],load:0x4->OXM_OF_METADATA[],resubmit(,5)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/480197
Committed: https://git.openstack.org/cgit/openstack/dragonflow/commit/?id=d0e6cde422d57d6c00156fbad82cd9372d898b2a
Submitter: Jenkins
Branch: master

commit d0e6cde422d57d6c00156fbad82cd9372d898b2a
Author: Omer Anson <email address hidden>
Date: Tue Jun 27 17:20:27 2017 +0300

    Classifier to use OvsPort events

    Partial-Bug: #1690775
    Closes-Bug: #1702426
    Change-Id: I56bf41b9ad59092c1cd188efcf26a48fd189dca3