Add scenario 'test_preserve_preexisting_port'

When a server is created with a neutron port specified, the port
shouldn't be deleted when the server is deleted, it should be updated to
be 'unbound' from the server but still exist in neutron.

Depends-On: Ia5367cf064d40690670ffeac3c1f16998464c234

Related-Bug: #1158684

Change-Id: Ia9b09eb8430f2bef39db64b702b9faed1042396b
1 file changed