[Review] Request from 'schubi2' @ 'yast/yast-installation/review_140825_autoyast_minimal_configuration'

Please review the following changes:
  * d191d96 packaging
  * 52ab4d3 moved minimal configuration to a central place
  * 186e88f moved minimal installation to a central place in inst_finish
  * beefc0b autoyast: flag second_stage: enable/disable second stage installation