This PS updates python modules and code to match Airflow 2.6.2:
- bionic py36 gates were removed
- python code corrected to match new modules versions
- selection of python modules versions was perfoemed based on
airflow-2.6.2 constraints
- airskiff deploy pipeline was aligned with latest in treasuremap v1.9
Change-Id: If6f57325339995216d2553c7a5ff56e7673b5acc