Add support for timezone and hardware clock

[jcpunk]

Pull Request (PR) description

Add support for timedatectl to set timezone and hardware clock

This Pull Request (PR) fixes the following issues

Fixes: #377

[jcpunk]

I almost went with

  if $set_local_rtc {
    exec { 'set local hardware clock to local time':
      command => 'timedatectl set-local-rtc 1',
      onlyif  => 'test $(timedatectl show | grep LocalRTC | cut -d= -f2) = no',
      path    => $facts['path'],
    }
  } else {
    exec { 'set local hardware clock to UTC time':
      command => 'timedatectl set-local-rtc 0',
      unless  => 'test $(timedatectl show | grep LocalRTC | cut -d= -f2) = no',
      path    => $facts['path'],
    }
  }

But that make the hardware clock explicitly managed when it wasn't before. I don't believe localtime is rational for POSIX system, but I'm not sure just pushing that on folks is the right call.

[TheMeier]

I would have preferred systemd::timedatectl to be not funneled through the main class, then the params could be non-optional. But the whole module is designed in that way, and others have different opinions on that ;)

So LGTM...

[jcpunk]

Changes merged.

[jcpunk]

In theory this is sorted.