Address upgrade functionality, and role re-apply.

- Add `update_cache` to Debian apt module task
- Add force deletion of init scripts (useful when upgrading)
- Modify template creation to predicate off of install mode
- Modify template creation to notify service restart
- Remove when clause from service restart handlers
- Modify `mesos_install_mode` to be `master` from `local`
- Remove `local` mode as an option
- Bump version to `0.1.5`