Adds paging fail tests for Queues.

Note that one of the tests does not pass!
The two helper methods are based on very similar methods in Fallbacks, which is why they are here like that. 
https://github.com/jclouds/jclouds/blob/master/core/src/main/java/org/jclouds/Fallbacks.java#L190

I guess it makes sense to refactor them here.