Fix Instance deletion in unit tests

We need to actually return a NotFound exception from the nova client,
rather than just relying on it returning a status other than ACTIVE.

Change-Id: I1bb0d07db0ffb5c0ed780eb4ca7f5d7ddb98510e
Signed-off-by: Zane Bitter <zbitter@redhat.com>
Wait for deletion of Instances during creation

When an Instance was still in the BUILD state when it was deleted, the
resource was not waiting for the instance to be deleted before declaring
success and moving on.

Change-Id: I05d553fedf10e01a06e20ca0e8ccbbbf463980e4
Signed-off-by: Zane Bitter <zbitter@redhat.com>
Merge "Fix Instance deletion in unit tests"
Merge "Wait for deletion of Instances during creation"