bug #14989 [FrameworkBundle] Reuse PropertyAccessor service for ObjectNormalizer (dunglas)

This PR was squashed before being merged into the 2.7 branch (closes #14989).

Discussion
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[FrameworkBundle] Reuse PropertyAccessor service for ObjectNormalizer

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

Inject the `property_accessor` service if available in the `ObjectNormalize` instead of creating a new instance.

Commits
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256d441 [FrameworkBundle] Reuse PropertyAccessor service for ObjectNormalizer

Author: fabpot

Resources/config/form.xml

@@ -55,8 +55,10 @@
         </service>
 
         <!-- CoreExtension -->
+        <service id="form.property_accessor" alias="property_accessor" public="false" />
+
         <service id="form.type.form" class="Symfony\Component\Form\Extension\Core\Type\FormType">
-            <argument type="service" id="property_accessor"/>
+            <argument type="service" id="form.property_accessor" />
             <tag name="form.type" alias="form" />
         </service>
         <service id="form.type.birthday" class="Symfony\Component\Form\Extension\Core\Type\BirthdayType">

Resources/config/serializer.xml

@@ -17,9 +17,13 @@
             <argument type="collection" />
         </service>
 
+        <service id="serializer.property_accessor" alias="property_accessor" public="false" />
+
         <!-- Normalizer -->
         <service id="serializer.normalizer.object" class="Symfony\Component\Serializer\Normalizer\ObjectNormalizer" public="false">
             <argument type="service" id="serializer.mapping.class_metadata_factory" />
+            <argument>null</argument>
+            <argument type="service" id="serializer.property_accessor" />
 
             <!-- Run after all custom serializers -->
             <tag name="serializer.normalizer" priority="-1000" />