GitLab

Add daemon.json config to allow customization of docker config. Also removed old lock if it doesn't match current package version with yum versionlock

We still need to remove old packages, just in case. We're going to omit docker-selinux and docker-engine-selinux which are shared with the releases from docker-ce-stable. YUM doesn't allow a way to declare that only packages from a sepcific repository should be removed

'Changed' all the time bug should be fixed since we're not accidentally removing the docker package every time when this role starts

Remove docker package from listing of 'old' packages since it'd just get overridden with the new package anyway

* Remove unneeded attempt at a newline when creating the test inventory file during a gitlab CI run