Replace find_by_id with find

Author: PanSpagetka

app/controllers/mixins/actions/vm_actions/ownership.rb

@@ -168,7 +168,7 @@ def ownership_handle_save_button
                           if params[:group].blank?    # to clear previously set group
                             nil
                           elsif params[:group] != @group
-                            MiqGroup.find_by_id(params[:group])
+                            MiqGroup.find(params[:group])
                           end
                         end