Merge branch '3.4' into 4.1

* 3.4: (21 commits)
  Added the Code of Conduct file
  do not override custom access decision configs
  [Security] Do not deauthenticate user when the first refreshed user has changed
  invalidate stale commits for PRs too
  add missing cache prefix seed attribute to XSD
  fix command description
  Fix class documentation
  [Validator] Add a missing translation
  [FrameworkBundle] Fix 3.4 tests
  [DI] fix dumping inline services again
  Fix phpdocs
  [EventDispatcher] Remove template method in test case
  Added LB translation for #27993 (UUID validator message translation)
  Replace deprecated validateValue with validate
  [FWBundle] Automatically enable PropertyInfo when using Flex
  [Process] fix locking of pipe files on Windows
  Correct PHPDoc type for float ttl
  bumped Symfony version to 3.4.18
  updated VERSION for 3.4.17
  updated CHANGELOG for 3.4.17
  ...

Author: nicolas-grekas

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>