Merge branch '2.8' into 3.4

* 2.8:
  Fix class documentation
  [Validator] Add a missing translation
  Fix phpdocs
  [EventDispatcher] Remove template method in test case
  Added LB translation for #27993 (UUID validator message translation)
  Replace deprecated validateValue with validate

Author: fabpot

Context/ExecutionContextInterface.php

@@ -97,7 +97,7 @@ public function buildViolation($message, array $parameters = array());
      *     {
      *         $validator = $this->context->getValidator();
      *
-     *         $violations = $validator->validateValue($value, new Length(array('min' => 3)));
+     *         $violations = $validator->validate($value, new Length(array('min' => 3)));
      *
      *         if (count($violations) > 0) {
      *             // ...

Resources/translations/validators.lb.xlf

@@ -318,6 +318,10 @@
                 <source>Error</source>
                 <target>Feeler</target>
             </trans-unit>
+            <trans-unit id="83">
+                <source>This is not a valid UUID.</source>
+                <target>Dëst ass keng gëlteg UUID.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>

Resources/translations/validators.pl.xlf

@@ -318,6 +318,10 @@
                 <source>Error</source>
                 <target>Błąd</target>
             </trans-unit>
+            <trans-unit id="83">
+                <source>This is not a valid UUID.</source>
+                <target>To nie jest poprawne UUID.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>