Roman Gorshunov 416df18353 Remove Python 2.x support
Drop support of Python 2.x as it is being deprecated.

Updated documentation, tox config, requirements.txt.

Job templates added:
- openstack-python35-jobs: openstack-tox-py35
- openstack-python3-ussuri-jobs: openstack-tox-py36, openstack-tox-py37

Job added:
- openstack-tox-pep8

Job templates removed:
- openstack-python-jobs: openstack-tox-pep8, openstack-tox-py27

Jobs removed:
- deckhand-tox-py27-postgresql

Change-Id: I7783ba841258a913f5ecd9d6f1130d378345ab5a
2019-10-08 12:41:12 +00:00
..
2019-10-08 12:41:12 +00:00