* Add fact module, tasks, example playbook, and service mapping file for supporting service restarts
* Improve service restart tasks and module
Support user-defined custom service maps, processing of service lists,
improved exception handling in get_docker_containers. Moved default
service map to vars.
* Cleanup variables
Move mapping file to a variable, condense extraneous steps to combine default
and user maps into an in-task step, some better var naming