Merge branch '6.4' into 7.2

* 6.4:
  [Routing] Add test to validate that default value is allowed to not match requirement
  fix handling required options
  Fix @var phpdoc
  [Lock] [MongoDB] Enforce readPreference=primary and writeConcern=majority
  [FrameworkBundle] fix phpdoc in `MicroKernelTrait`
  Fixed validator translations for Albanian

Author: nicolas-grekas

Tests/OptionsResolverTest.php

@@ -1368,7 +1368,7 @@ public function testNormalizerCanAccessOtherOptions()
         $this->resolver->setDefault('norm', 'baz');
 
         $this->resolver->setNormalizer('norm', function (Options $options) {
-            /* @var TestCase $test */
+            /** @var TestCase $test */
             Assert::assertSame('bar', $options['default']);
 
             return 'normalized';
@@ -1386,7 +1386,7 @@ public function testNormalizerCanAccessLazyOptions()
         $this->resolver->setDefault('norm', 'baz');
 
         $this->resolver->setNormalizer('norm', function (Options $options) {
-            /* @var TestCase $test */
+            /** @var TestCase $test */
             Assert::assertEquals('bar', $options['lazy']);
 
             return 'normalized';