bug id 1400590 UI Port Config issues
Fixed points 1,3,4 In bug id 1400590.

1. Owner change for compute is sent to nova and it passes. But owner field is
also updated from UI, thus port attach fails. Need to not set owner from UI when
compute owner is set.
2. Allowed address pair is seen in neutron, but vrrp needs to be tested.
3. Owner setting needs to allow any VM uuid to be input from a user.
4. Router owner change leads to all other existing router interfaces on the
router to be removed.
5. In certain cases UI backend doesn't return.

Change-Id: If641ff85595cfee4316103834a5956bf8cdbabf2
Partial-Bug: #1400590
Merge "bug id 1400590 UI Port Config issues Fixed points 1,3,4 In bug id 1400590."