Add /srv/tftpboot/discovery/pxelinux.cfg/default

Moved from install-chef-suse.sh. Needed to make the provisioner work.
Add Cloud-PTF repo skeleton

Moved from install-chef-suse.sh. Needed to make AutoYaST happy.
Add compatibility link to /srv/tftpboot

Moved from install-chef-suse.sh. Part of Crowbar package.