loginctl_user completes before `systemd --user` is really ready

[traylenator]

With:

loginctl_user{'higgs':
  linger  => enabled,
}
systemd::user_service { 'hour.service':
  ensure    => true,
  enable    => true,                                   
  user      => 'higgs',
  require => loginctl_user['higgs'],
}

it can fail with

 Failed to connect to user scope bus via local transport: No such file or directory

adding an extra sleep.

exec{'/usr/bin/sleep 10 && touch /tmp/sleep-only-once':
    creates   => '/tmp/sleep-only-once',
    require   => Loginctl_user['higgs'],
    before    => systemd::user_service { 'hour.service':},
}

is enough for success.

If this is fixed remove this workaround that was added in #577