Add functional test for neutron port

Patch covers several common update cases:
 - update replace when port has not assigned ip and it will be
   changed
 - update replace port with assigned fixed ip - will raise a Error
 - update in-place, with changing any update_allowed property

Related-Bug: #1455100

Change-Id: Ibd133db87f210916c1609b36343d93f165b37677
1 file changed
tree: 798664b8e68375a13ade6c2fb362d556188dfd8b
  1. common/
  2. functional/
  3. scenario/