GetRunningServices() was returning all services, running or stopped.
Hence, rename to reflect what this function does, and rewrite slightly
to better capture what is actually happening. Also, don't return the
container ID, as we don't use it.

Call stop on all services, as we will down the deployment right after.
The list of services is still used to retrieve logs.

Remove a stray "return False", which would sometimes prevent us from
seeing all error messages.