Ticket 48273 - Update lib389 tests for new valgrind functions
Description: Update the existing tests that use valgrind, to use the
new process. Added finailizers so that we always disable
valgrind at the end of the test.
https://fedorahosted.org/389/ticket/48273
Reviewed by: nhosoi(Thanks!)
(cherry picked from commit c2e350e6280ec53fb226fb981d55069aa0c626f8)
Conflicts:
dirsrvtests/tickets/ticket48226_test.py