Merge request to support Postgres #1285
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update db_common.py -
update db_manager.py -
update db_structure.py -
Add pytest tests -
update database_manager.py -
update experiment_status_db_manager.py -
update experiment_history_db_manager.py -
check nullable values that are not nullable (sqlite does not enforce & AS code is writing nulls!) -
perform tests listed in the issue #1285