bug symfony#24743 [FrameworkBundle] Do not activate the cache if Doctrine's cache is not present (sroze)

This PR was merged into the 3.4 branch.

Discussion
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[FrameworkBundle] Do not activate the cache if Doctrine's cache is not present

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#24683
| License       | MIT
| Doc PR        | ø

Annotations are automatically enabled when the `doctrine/annotations` package is around. These annotations are enabled with the `php_array` cache by default, which require `doctrine/cache`.

This PR allow this scenario to happen by disabling the annotation cache when `doctrine/cache` is not present.

Commits
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c5c7a23 Do not activate the cache if Doctrine's cache is not present

Author: fabpot

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php

@@ -12,6 +12,7 @@
 namespace Symfony\Bundle\FrameworkBundle\DependencyInjection;
 
 use Doctrine\Common\Annotations\Annotation;
+use Doctrine\Common\Cache\Cache;
 use Symfony\Bundle\FullStack;
 use Symfony\Component\Asset\Package;
 use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
@@ -741,7 +742,7 @@ private function addAnnotationsSection(ArrayNodeDefinition $rootNode)
                     ->info('annotation configuration')
                     ->{class_exists(Annotation::class) ? 'canBeDisabled' : 'canBeEnabled'}()
                     ->children()
-                        ->scalarNode('cache')->defaultValue('php_array')->end()
+                        ->scalarNode('cache')->defaultValue(interface_exists(Cache::class) ? 'php_array' : 'none')->end()
                         ->scalarNode('file_cache_dir')->defaultValue('%kernel.cache_dir%/annotations')->end()
                         ->booleanNode('debug')->defaultValue($this->debug)->end()
                     ->end()