1038273: correctly paginate when listing pools by consumer

It looks like we forgot to take advantage of the postFilter
method in AbstractHibernateCurator.

OwnerResource does postfiltering when a consumer is supplied,
otherwise we don't filter based on the rules.
Added spec test that exposes the pool pagination issue
Merge pull request #461 from candlepin/ckozak/pool_pagination

1038273: correctly paginate when listing pools by consumer