Move EE code on Groups::GroupMembersController to EE namespace

app/controllers/ee/groups/group_members_controller.rb

+module EE
+  module Groups
+    module GroupMembersController
+      def override
+        @group_member = @group.group_members.find(params[:id])
+
+        return render_403 unless can?(current_user, :override_group_member, @group_member)
+
+        if @group_member.update_attributes(override_params)
+          log_audit_event(@group_member, action: :override)
+
+          respond_to do |format|
+            format.js { head :ok }
+          end
+        end
+      end
+
+      protected
+
+      def authorize_update_group_member!
+        unless can?(current_user, :admin_group_member, group) || can?(current_user, :override_group_member, group)
+          render_403
+        end
+      end
+
+      def override_params
+        params.require(:group_member).permit(:override)
+      end
+    end
+  end
+end

app/controllers/groups/group_members_controller.rb

 class Groups::GroupMembersController < Groups::ApplicationController
+  prepend EE::Groups::GroupMembersController
+
   include MembershipActions
 
   # Authorize
@@ -79,20 +81,6 @@ class Groups::GroupMembersController < Groups::ApplicationController
     end
   end
 
-  def override
-    @group_member = @group.group_members.find(params[:id])
-
-    return render_403 unless can?(current_user, :override_group_member, @group_member)
-
-    if @group_member.update_attributes(override_params)
-      log_audit_event(@group_member, action: :override)
-
-      respond_to do |format|
-        format.js { head :ok }
-      end
-    end
-  end
-
   protected
 
   def authorize_update_group_member!
@@ -105,10 +93,6 @@ class Groups::GroupMembersController < Groups::ApplicationController
     params.require(:group_member).permit(:access_level, :user_id, :expires_at)
   end
 
-  def override_params
-    params.require(:group_member).permit(:override)
-  end
-
   # MembershipActions concern
   alias_method :membershipable, :group
 end