Goal: 

• With the newest candlepin release, we need to remove the content from

Acceptance Criteria:

Currently our unit tests show an error:

{"displayMessage":"Content \"b1e2bc3e5b3d4c4187a77d3ff941de68\" cannot be deleted while referenced by one or more products","requestUuid":"7ebbdd84-426f-48c6-887f-1de8d68d1d2b"}

when a repository is deleted.   Talking with crog, we need to remove the content set from its product before deleting it.  This was an intended change