Ensure ordering for group sorting tests
Ensure ordering for group sorting tests

Instead of manually creating list to compare the test result,
use system sort to assure no errors are introduced.

Signed-off-by: Marko, Peter <127d1ab174b845a783e3d30c7983c9f496a97b43@siemens.com>

jirutka/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,jirutka/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,iiet/iiet-git,stoplightio/gitlabhq,jirutka/gitlabhq,iiet/iiet-git,iiet/iiet-git,axilleas/gitlabhq,iiet/iiet-git,dreampet/gitlab,dreampet/gitlab,stoplightio/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq,axilleas/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,dreampet/gitlab