This PS is created to :
- roll back apache-airflow back to 1.10.5
- change default chart values from bionic to ubuntu_focal
- save freshly generated config and policy files samples
- in focal Dockerfile postgres client version is pubped up to v15
- change airflow docker image requirements from limited to fully frozen for shipyard-airflow project
- adjusted requirements-direct.txt for shipyard_airflow
- adjusted requirements-direct.txt for shipyard_client
- regenerated requirements-frozen for both projects
- fixed unit tests after upgrading click module
- gen_all tox profile processing has been moved over to py8 gate because it requires focal zuul node to run
- upgraded airskiff gate playbook to include latest treasuremap patchset with updated airskiff site admada manifests
Change-Id: I47e44f5cfa19b2649697e7cc5a31557a6f4fcfea
b7e7d25308