* Use distro specific Ansible modules to install NGINX
* Install NGINX directly in Alpine distributions from the official repository to avoid naming conflicts
* Set travis_wait parameter to max timeout setting
* Use slim Debian images for testing
* Update `volume_mounts` to `volumes`
* Update and move default Dockerfile
* Use normal centos image
* Add epel-release prerequisite to CentOS modules
* Separate module and template tests