List of added actions:
* disable
* enable
* remove-from-cloud
* register-to-cloud
More detailed explanation of the process added to the README.md
Closes-Bug: #1691998
Change-Id: I45d1def2ca0b1289f6fcce06c5f8949ef2a4a69e
func-test-pr: https://github.com/openstack-charmers/zaza-openstack-tests/pull/470