feature #19741 [ExpressionLanguage] Making cache PSR6 compliant (Alexandre GESLIN)

This PR was merged into the 3.2-dev branch.

Discussion
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[ExpressionLanguage] Making cache PSR6 compliant

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | N/A
| License       | MIT
| Doc PR        | [#7064](symfony/symfony-docs#7064)

Adding Cache component compatible ParserCache in ExpressionLanguage component.
I hope you will find it useful :) I would like to make tests also

Commits
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a7352ff [ExpressionLanguage] Making cache PSR6 compliant

Author: fabpot

ExpressionLanguage/DoctrineParserCache.php

@@ -11,12 +11,16 @@
 
 namespace Symfony\Bridge\Doctrine\ExpressionLanguage;
 
+@trigger_error('The '.__NAMESPACE__.'\DoctrineParserCache class is deprecated since version 3.2 and will be removed in 4.0. Use the Symfony\Component\Cache\Adapter\DoctrineAdapter class instead.', E_USER_DEPRECATED);
+
 use Doctrine\Common\Cache\Cache;
 use Symfony\Component\ExpressionLanguage\ParsedExpression;
 use Symfony\Component\ExpressionLanguage\ParserCache\ParserCacheInterface;
 
 /**
  * @author Adrien Brault <adrien.brault@gmail.com>
+ *
+ * @deprecated DoctrineParserCache class is deprecated since version 3.2 and will be removed in 4.0. Use the Symfony\Component\Cache\Adapter\DoctrineAdapter class instead.
  */
 class DoctrineParserCache implements ParserCacheInterface
 {

Tests/ExpressionLanguage/DoctrineParserCacheTest.php

@@ -13,6 +13,9 @@
 
 use Symfony\Bridge\Doctrine\ExpressionLanguage\DoctrineParserCache;
 
+/**
+ * @group legacy
+ */
 class DoctrineParserCacheTest extends \PHPUnit_Framework_TestCase
 {
     public function testFetch()