minor #17931 [FrameworkBundle] Fix PropertyInfo registration when usi…

…ng reflection-docblock 3 (dunglas)

This PR was squashed before being merged into the 3.1-dev branch (closes #17931).

Discussion
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[FrameworkBundle] Fix PropertyInfo registration when using reflection-docblock 3

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | yes
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Currently, the PHPDoc extractor of PropertyInfo is not registered anymore because #17531 was merged.

Commits
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6d31365 [FrameworkBundle] Fix PropertyInfo registration when using reflection-docblock 3

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

@@ -1010,7 +1010,7 @@ private function registerPropertyInfoConfiguration(array $config, ContainerBuild
 
         $loader->load('property_info.xml');
 
-        if (class_exists('phpDocumentor\Reflection\ClassReflector')) {
+        if (class_exists('phpDocumentor\Reflection\DocBlockFactoryInterface')) {
             $definition = $container->register('property_info.php_doc_extractor', 'Symfony\Component\PropertyInfo\Extractor\PhpDocExtractor');
             $definition->addTag('property_info.description_extractor', array('priority' => -1000));
             $definition->addTag('property_info.type_extractor', array('priority' => -1001));

src/Symfony/Bundle/FrameworkBundle/composer.json

@@ -50,7 +50,10 @@
         "symfony/validator": "~2.8|~3.0",
         "symfony/yaml": "~2.8|~3.0",
         "symfony/property-info": "~2.8|~3.0",
-        "phpdocumentor/reflection": "^1.0.7"
+        "phpdocumentor/reflection-docblock": "^3.0"
+    },
+    "conflict": {
+        "phpdocumentor/reflection-docblock": "<3.0"
     },
     "suggest": {
         "symfony/console": "For using the console commands",