Fixes #5001: Technique groupManagement: members of group are enforced at group creation even if option is not set
Merge pull request #409 from jooooooon/bug_5001/technique_groupmanagement_members_of_group_are_enforced_at_group_creation_even_if_option_is_not_set

Fixes #5001: Technique groupManagement: members of group are enforced at...
Merge branch 'branches/rudder/2.6' into branches/rudder/2.9
Merge branch 'branches/rudder/2.9' into branches/rudder/2.10