works with collection on Ansible 2.9; works with jinja 2.7

• a fix for modules and module_utils so that they work when used inside a collection when using Ansible 2.9
• make the role work with jinja 2.7

Changes to support conversion to collections

This contains changes to support conversion to collection as well as some tox/travis fixes. No functionality changes.

Initial release of certificate management

This role is used to issue TLS/SSL certificates and to manage automatic
renewal of those certificates. The default provider is certmonger.
This role can work with FreeIPA to manage certificates issued by
FreeIPA.