Accommodation result seems not to be consistent

Depending on the request accommodations can be shown even without any active offer

In certain cases the result set of accommodations do not seem to be correct if a structure does not have an active offer. This is because there is a logic defined as follows:

1. The response should be slim, therefore accommodations without offers are filtered.
2. If there are a few or no results, the result set gets filled up with accommodation WITHOUT offers to prevent an empty result set.

Details in ticket https://issues.opendatahub.bz.it/Ticket/Display.html?id=920