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 perfrmed based on
airflow-2.6.2 constraints
- airskiff deploy pipeline was aligned with latest in treasuremap v1.9
- postgresql image updated to 14.8
Change-Id: I65a1b86473ee3e988aae353b59fb5473d75851f9