Automatic merge from submit-queue
Checking function integrated with get from chanel in fed tests
Current federation controller tests assume that each actions results in only one etcd action. However, due to various timing issues, this may not necessary the truth and multiple updates can be generated. Thus tests should try to get all available messages from the debug channels instead failing on the first message, which may come from the previous test scenario.
Applied to deployment tests. Other tests will be updated in the following PR(s).
cc: @quinton-hoole @wojtek-t
