Small changes to ensure ranger-tempest-plugin is ready for the end of python 2.7 support. Change-Id: Ib1dd506ccf5bbd419ced9c3e81dabfb0cde08719
First commit with zuul tests and migration of existing Ranger-Tempest- Plugin codebase. Change-Id: I45d6946a397cc148ec3789af1c1ad4374a99396a