The current rebuild testing in test_instance_action changes the image
used by the instance, therefore the actions tested in
test_instance_action had to be in specific order as testing rebuild
also changes the output json.
The rebuild test was moved from test_instance_action to its own method,
and now all the actions in test_instance_actions keeps the instance in
the same state.
Change-Id: Id0a7aaf8575d69deb89d3842b54fc23ee05b2153
Implements: bp versioned-notification-transformation-pike
Gábor Antal