test: Call custom destructor hook if defined
test: Call custom destructor hook if defined

Change-Id: Iaa076b3e2f861b162a271f4e86aca4c9440ba9f9
Reviewed-on: http://review.couchbase.org/45201
Tested-by: Mark Nunberg <e7d42768707bf23038325b0b68d4b577e5f6064a@haskalah.org>
Reviewed-by: Volker Mische <fb414f8ac0dbbf87663550ae4ef5fc95b1041941@gmail.com>

couchbase/couchbase-python-client,mnunberg/couchbase-python-client,couchbase/couchbase-python-client,mnunberg/couchbase-python-client