NodePredicates gained static predicate SUSPENDED

Issue can be found in JIRA here: https://issues.apache.org/jira/browse/JCLOUDS-596

Please import `assertTrue` and `assertEquals` statically. Also, what is the latter assertion getting us? It seems to just be verifying that, if you create an AtomicReference that refers to x, then x will be returned if you get the reference? We don't need to be testing that in jclouds, I guess?