Ticket 48019 - Remove refs to constants.py and backup/restore from lib389 tests
Bug Description: The backup and restore process did not work well with mutliple
tests that use replication and the same server identified. The
backup and restore process takes just as long as installing a
constants.py is now deprecated as its contents were moved into
the core lib389 module(_constants.py).
Fix Description: Remove the backup and restore logic from the topology functions.
Cleaned up the imports which included removing the references
to constants.py. Added a consistent "success" message to each
Reviewed by: nhosoi(Thanks!)