Merge branch '4.3' into 4.4

* 4.3:
  cleanups
  Disable PHPUnit result cache on the CI
  [Security] Cleanup "Digest nonce has expired." translation
  [Translation] Highlight invalid translation status
  Added translations in validator for Serbian Cyrillic
  Added translations in validator for Serbian Latin
  [EventDispatcher] wrong Request class
  [DependencyInjection] improved exception message

Author: nicolas-grekas

Resources/translations/security.fa.xlf

@@ -30,10 +30,6 @@
                 <source>Invalid CSRF token.</source>
                 <target>توکن CSRF معتبر نمی باشد.</target>
             </trans-unit>
-            <trans-unit id="8">
-                <source>Digest nonce has expired.</source>
-                <target>Digest nonce منقضی گردیده است.</target>
-            </trans-unit>
             <trans-unit id="9">
                 <source>No authentication provider found to support the authentication token.</source>
                 <target>هیچ ارایه دهنده احراز هویتی برای پشتیبانی از توکن احراز هویت پیدا نشد.</target>