ofagent: broken XenAPI support

[YAMAMOTO Takashi]

ofagent has code for agent-on-DomU support inherited from OVS agent.
However, it's incomplete and broken. Because ofagent uses a direct
OpenFlow channel instead of ovs-ofctl command to program a switch,
the method to use the special rootwrap can not work.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/120677

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/120677
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=60816b637d391aa5e5aef9b4b3a432b5ce552cc8
Submitter: Jenkins
Branch: master

commit 60816b637d391aa5e5aef9b4b3a432b5ce552cc8
Author: YAMAMOTO Takashi <email address hidden>
Date: Thu Sep 11 12:00:13 2014 +0900

    ofagent: Remove broken XenAPI support

    ofagent has code for agent-on-DomU support inherited from OVS agent.
    However, it's incomplete and broken. Because ofagent uses a direct
    OpenFlow channel instead of ovs-ofctl command to program a switch,
    the method to use the special rootwrap can not work.

    Closes-Bug: #1368006
    Change-Id: I0bb25a296d1f1e65c233ece6deaef6c095d78707