Maintenance/pim portage 1.2

Bug fix: no
Feature addition: yes
Backwards compatibility break: yes
Phpspec specification passes: yes
Checkstyle issues: no
ChangeLog updated: yes
Fixes the following issue: #230

Need to fix how mapping is displayed in export jobs view mode.
This class should be removed. Only one method used which does not call the base group manager (getRepository) but this method exists in the groupManager so no need to duplicate it.