Update to enablerepo functionality to work better with Ansible 2.7.0.

Fixes geerlingguy#289: Bump minimum Ansible version requirement.

Merge pull request geerlingguy#275 from andreykaipov/feature/always-r…

…egister-mysql-version

Fix geerlingguy#274: Always register the mysql_cli_version variable

Merge pull request geerlingguy#273 from andreykaipov/feature/mysql-v8…

…-compatibility

Make the role compatible with MySQL 8

Fixes geerlingguy#251: Fix Ansible 2.4+ deprecation warnings for incl…

…ude and static.

Fix deprecation warnings in Ansible 2.5 for state 'present'.

Fixes geerlingguy#246: Use adm group for log files on Debian/Ubuntu.

PR geerlingguy#240: Add documentation on deleting databases.

PR geerlingguy#228 Docs adjustments.

Merge pull request geerlingguy#218 from joelpittet/master

Set default query_cache_type off to match mysql default