- Switch to stable/queens spec template

- update to version 1.6.0 (bsc#1078607)
- Remove the python-subunit from test-requirements.txt
- Update reno for stable/pike
- Remove setting of version/release from releasenotes
- Use namespace to allow CommandManager to load actions
- Fix creating freezer client with keystone auth session
- Remove astroid from test-requirements
- Avoid tox_install.sh for constraints support
- Update wrong url for freezerclient
- Fix guess auth version error
- Updated from global requirements
- Update cli reference

- Convert to singlespec