fix(actors): use first / last name in generataed tickets

also fallback to login if they are empty

fix #1016

Signed-off-by: btry <tbugier@teclib.com>

inc/fields/actorfield.class.php

@@ -212,7 +212,7 @@ protected function sanitizeValue($value) {
             $user->getFromDB($item);
             if (!$user->isNewItem()) {
                // A user known in the DB
-               $knownUsers[$user->getID()] = $user->getField('name');
+               $knownUsers[$user->getID()] = $user->getRawName();
             }
          }
       }