undo previous test fix because we want to cherry pick it
Adding management_url to test mock client

Mocking management_url property in keystoneclient.Client for mox.

Change-Id: I53dbb9357808584007b2871d4804150e2c547436
Closes-Bug: #1268631
Fixing tests to work with keystoneclient 0.6.0

Another item needs mocking with the new release of
python_keystoneclient. Adding it to mocked keystoneclient.Client
object.

Closes-Bug: #1279907
Change-Id: I3c43a7290a6e05c718082dcad369162bf21e3603