Fixed behavior in Mode.update

- Selected products should be used not only in new installation
  but also in update
Extended test case

- Onlt only Installation, but also Update
Changes and version
Simplified according to comments
Merge pull request #236 from kobliha/product_init-fix_update

Fixed Product lazy loading in Update mode
Fixed a typo and saved one second
Fixed test case
Merge pull request #237 from kobliha/fix_failing_build_after_changing_service_handling

Fixed failing testsuite