[Review] Request from 'digitaltom' @ 'SUSE/connect/review_140923_add_vagrant_to_the_gemfile_for_integration_testing'

Please review the following changes:
  * dc23045 add vagrant to the gemfile
  * 78575dc Merge pull request #176 from SUSE/review_140922_raise_error_in_case_zypper_tries_to_go_interactive
  * c14233a raise error in case zypper tries to go interactive
  * e8e86d9 wording (fixes bnc#897528)