1130153 - Fixed regression with consumer binding retrieval.

The regression made it impossible to retrieve a consumer's bindings
after a distributor it was bound to was deleted. This, in turn, made
it impossible for the distributor to remove the bindings after it was
removed. 

This PR fixes the following bugs:
https://bugzilla.redhat.com/show_bug.cgi?id=1130153
https://bugzilla.redhat.com/show_bug.cgi?id=1130151