Don't always skip on Docker

Tests running in Molecule on Travis skip some tasks like managing services, rebooting and managing files mounted from the host to the guest because these tasks won't work.

There is now an option to use the role and -don't- skip these tasks. This is for people that use this role on a Docker container that want to run the tasks anyway.

If you're not running these roles on Docker, this release has no impact, neither is there impact for tests.