
The existing code incorrectly used the stale value from a previous list comprehension - and deleted the chains for the wrong router :( (Found via pylint) Also: change to using a set() rather than a list(), since it is used for repeated membership tests. Also: refactor test cases to remove test case duplication. Closes-Bug: #1362466 Change-Id: I4df400d57bab5427362db47a715576faa6340173