Change in vdsm[master]: ovs-dpdk: support ovs 2.7

[Code Review]

From Dan Kenigsberg :

Dan Kenigsberg has posted comments on this change.

Change subject: ovs-dpdk: support ovs 2.7
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Patch Set 7:

unrelated failure

ERROR: test_with_device (loopback_test.TestDevice)
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Traceback (most recent call last):
  File "/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/tests/testValidation.py", line 191, in wrapper
    return f(*args, **kwargs)
  File "/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/tests/loopback_test.py", line 42, in test_with_device
    with loopback.Device(filename) as device:
  File "/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/tests/loopback.py", line 92, in __enter__
    self.attach()
  File "/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/tests/loopback.py", line 56, in attach
    raise cmdutils.Error(cmd, rc, out, err)
Error: Command ['losetup', '--find', '--show', '/tmp/tmpzf6_TD/file'] failed with rc=1 out='' err='losetup: /tmp/tmpzf6_TD/file: failed to set up loop device: No such file or directory\n'