Description of problem:
When powering off VM with port mirroring enabled the VM id down in the UI but stuck in down state in vdsm
vdsClient -s 0 list table
ea37ce01-3203-44b9-8f87-36e5550a23b7   3458  golden_env_mixed_virtio_0 Down

When running vdsClient -s 0 destroy ea37ce01-3203-44b9-8f87-36e5550a23b7 we get error Unexpected exception
Thread-281::ERROR::2015-08-18 20:22:55,031::__init__::527::jsonrpc.JsonRpcServer::(_serveRequest) Internal server error
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/yajsonrpc/__init__.py", line 522, in _serveRequest
    res = method(**params)
  File "/usr/share/vdsm/rpc/Bridge.py", line 277, in _dynamicMethod
    result = fn(*methodArgs)
  File "/usr/share/vdsm/API.py", line 337, in destroy
    res = v.destroy()
  File "/usr/share/vdsm/virt/vm.py", line 3757, in destroy
    result = self.doDestroy()
  File "/usr/share/vdsm/virt/vm.py", line 3775, in doDestroy
    return self.releaseVm()
  File "/usr/share/vdsm/virt/vm.py", line 3675, in releaseVm
    supervdsm.getProxy().unsetPortMirroring(network, nic.name)
  File "/usr/share/vdsm/supervdsm.py", line 50, in __call__
    return callMethod()
  File "/usr/share/vdsm/supervdsm.py", line 48, in <lambda>
    **kwargs)
  File "<string>", line 2, in unsetPortMirroring
  File "/usr/lib64/python2.7/multiprocessing/managers.py", line 773, in _callmethod
    raise convert_to_error(kind, result)
TrafficControlException: (22, 'RTNETLINK answers: Invalid argument', ['/usr/sbin/tc', 'qdisc', 'del', 'dev', u'ovirtmgmt', 'ingress'])


The VM cannot run again on this host untill I reboot the host


Version-Release number of selected component (if applicable):
vdsm-4.17.2-1.el7ev.noarch
rhevm-3.6.0-0.11.master.el6.noarch


Steps to Reproduce:
1. Create VM 
2. Create vNIC profile with port mirroring for ovirtmgmt network
3. Select the vNIC profile with the port mirroring for the VM
4. Start the VM
5. Power off the VM

Actual results:
VM is stuck in VDSM

Expected results:
VM is not stuck in VDSM