Fix race condition in test_image_rotation_invalid_external_name
Fix race condition in test_image_rotation_invalid_external_name

We had a race condition waiting for image002 being uploaded to the
cloud. Now, ensure we are waiting for the right images in our
waitForImage() calls.

Change-Id: I814b97360a62b6c447baa7c5eddc783c5ed82c8c
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

Tesora/tesora-nodepool,Tesora/tesora-nodepool