The galaxy upload rejects GPLv3 and requires a valid SPDX license
tag. The file headers list:

  GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

which is a way of saying "3 or later" - so use that SPDX tag.

Also - the license headers refer to the file being COPYING, so
rename the file and update it in the galaxy metadata to match.

Change-Id: I6c82b49d7ce5ea8c9cde939d5d37ff54b969a598

Migrate accordin to Ansible guidelines [1[]] and tool
migrate.py [2]
Also fixed ALL ansible-test sanity issues

Add pep8 and linter job with runs ansible-test sanity test.

[1] https://etherpad.openstack.org/p/openstack-ansible-modules
[2] https://github.com/ansible-community/collection_migration

Change-Id: Ib2b1c8f23aacfca95304132bfe5c4cdedbea0520