fix(core) Fill empty catch blocks with a comment to please Sonar

issue #6054

plugins/admin/groups/class_ogroup.inc

@@ -111,6 +111,7 @@ class GroupMembersAttribute extends ObjectsAttribute
           $infos = objects::infos(ogroup::$objectTypes[$this->types[$key]]);
         }
       } catch (NonExistingObjectTypeException $e) {
+        /* Ignore non-existing types, plugins may have been removed */
       }
       if (isset($infos['icon'])) {
         $img = $infos['icon'];

plugins/personal/roles/class_userRoles.inc

@@ -183,6 +183,7 @@ class userRoles extends simplePlugin
           $g->getBaseObject()->attributesAccess['member']->searchAndRemove($this->dn);
           $g->save();
         } catch (NonExistingLdapNodeException $e) {
+          /* Ignore deleted groups */
         }
       }
       /* Remove all roles */
@@ -192,6 +193,7 @@ class userRoles extends simplePlugin
           $r->getBaseObject()->attributesAccess['roleOccupant']->searchAndRemove($this->dn);
           $r->save();
         } catch (NonExistingLdapNodeException $e) {
+          /* Ignore deleted roles */
         }
       }
     }