[Review] Request from 'vlewin' @ 'SUSE/connect/review_140417_use_sles12_beta5_image_for_connect_testing'

Please review the following changes:
  * 8961fdf use sles12-beta5 image for connect testing
  * 43d5069 Merge pull request #57 from SUSE/review_140414_update_package
  * 2c6c728 Merge pull request #54 from SUSE/review_140414_distro_target
  * 761c73f Revert "Catch zypper error exit status and raise exception"
  * 2b8e66c Catch zypper error exit status and raise exception
  * e7de30e Update package
  * fde0104 allow to pass distro_target to announce_system