[EE] Support additional LabelsFinder parameters for group labels

Jan Provaznikrequested to merge
ee-jprovazn-ancestor-labels into master

This is EE version of gitlab-ce!17447

Also because LabelsFinder now supports both only_group_labels and include_*_groups we can use LabelsFinder in all cases (instead of if params[:only_group_labels]).

Edited by Coung Ngo

Merge request reports