Univention Corporate Server 3.2 erratum 160 (bugfix)

This update fixes the following issues:
* The setup wizard for UCS appliance has been entirely re-structured and
  rewritten, obsolete code paths have been cleaned up.
  Some of the new features inlcude:
  - A live search for world-wide cities to preconfigure locale settings.
  - Wizard language can be changed on the fly without a page load.
  - Some fields (host + domain name, gateway address etc.) are pre-filled
    with suggested values to ease the configuration.
  - The UCS license activation can now be carried within the wizard.
  - UCS components from the App Center can be installed in the wizard.
* Running setup scripts will not terminate when the UMC module process
  does, and also keep the UMC module process from timing out.
* Added welcome page with instructions to set a root password
  before accessing the setup wizard for EC2 setups