Issue 49761 - Fix CI test suite issues
Bug Description:
tickets/ticket48229 test had failures in CI nightly runs
Fix Description:
tickets/ticket48226_test.py file moved and renamed to tests/suite/memory_leaks/MMR_double_free_test.py
Use of Valgrind removed, as support for Valgrind is broken in lib389 - Test run only with ASAN build
Replaced depracated _s functions by use of DSLdapObject
Relates https://pagure.io/389-ds-base/issue/49761
Author: sgouvern
Reviewed by: vashirov, spichugi