Ticket #48226 - In MMR, double free coould occur under some special condition
Description: commit a0f8e0f981a046882db299a7a6d6d1c01bc19571 introduced
a memory leak in the case of resolve_attribute_state_present_to_deleted.
In the case, csnset is not consumed. Thus, it has to be freed by csnset_
Reviewed by firstname.lastname@example.org (Thank you, Mark!!)
(cherry picked from commit b26ec6762fe2b5d37ade59243086cfd2308e8f0a)