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 performed based on
airflow-2.6.2 constraints
- a new pegleg validation gate was created based on airskiff deploy
pipeline from treasuremap v1.9
Change-Id: Icc96deb0b745eaab7a19d83b00aad909dcd28c25