update autoyast for SLES 12 and OpenSuSE 13

- OpenSUSE:
  * install more software to get a working system

- SLES:
  * use Minimal software pattern
  * no additional repositories are needed for Puppet on SLES 12
  * implement logic to tap the correct repositories for versions
    without Service Pack
  * set hostname in chroot script to (hopefuly) workaround sporadic
    problems on SLES 12

- OpenSuSE and SLES
  * start sshd explicitly