Release 1.2.0

Features:
- Add `confdir`, `conffile`, `package_name`, and `service_name`
  parameters to `Class['xinetd']`
- Add support for FreeBSD and Suse.
- Add `log_on_failure`, `service_name`, `groups`, `no_access`,
  `access_times`, `log_type`, `only_from`, and `xtype` parameters to
  `Xinetd::Service` define

Bugfixes:
- Redesign for `xinetd::params` pattern
- Add validation
- Add unit testing