Incorrect logic in OVSQuantumAgent.port_unbound method

[Eugene Nikanorov]

The following piece of code could throw KeyError while intention was to avoid that:
https://github.com/openstack/quantum/blob/master/quantum/plugins/openvswitch/agent/ovs_quantum_agent.py#L475

        if lvm.network_type == 'gre':
            if self.enable_tunneling:
                # remove inbound unicast flow
                self.tun_br.delete_flows(tun_id=lvm.segmentation_id,
                                         dl_dst=lvm.vif_ports[vif_id].vif_mac)

        if vif_id in lvm.vif_ports:
            del lvm.vif_ports[vif_id]

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/27642

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/27642
Committed: http://github.com/openstack/quantum/commit/7dddca7ebd04d400436c3124220c0602a9a13482
Submitter: Jenkins
Branch: master

commit 7dddca7ebd04d400436c3124220c0602a9a13482
Author: Eugene Nikanorov <email address hidden>
Date: Sat Apr 27 20:43:13 2013 +0400

    Fix logic issue in OVSQuantumAgent.port_unbound method

    Fixes bug 1173463

    Change-Id: If2978fc4c38304667f6910085cb220491d236a11

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/grizzly
Review: https://review.openstack.org/27645

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/27815

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/27815
Committed: http://github.com/openstack/quantum/commit/b5c13293b3c587221d33df832ee8376bd971cbcd
Submitter: Jenkins
Branch: master

commit b5c13293b3c587221d33df832ee8376bd971cbcd
Author: Gary Kotton <email address hidden>
Date: Tue Apr 30 15:23:10 2013 +0000

    Treat unbound port

    Following a nice suggestion by S Orlando regarding the fix for
    bug 1173463

    Change-Id: I2fa2a2fa7852025f0c18ff27c5fffc5667ce8378

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/grizzly
Review: https://review.openstack.org/28352

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/28352
Committed: http://github.com/openstack/quantum/commit/abf328868fb74e5f1eb51ba05ccf8e5bfca11c0c
Submitter: Jenkins
Branch: stable/grizzly

commit abf328868fb74e5f1eb51ba05ccf8e5bfca11c0c
Author: Gary Kotton <email address hidden>
Date: Tue Apr 30 15:23:10 2013 +0000

    Treat unbound port

    Following a nice suggestion by S Orlando regarding the fix for
    bug 1173463

    Change-Id: I2fa2a2fa7852025f0c18ff27c5fffc5667ce8378