add missing doctrine alias removed in doctrine-bundle@1.9

Author: abluchet

src/Bridge/Symfony/Bundle/Resources/config/doctrine_orm.xml

@@ -164,6 +164,7 @@
             <tag name="api_platform.doctrine.orm.query_extension.collection" priority="16" />
         </service>
         <service id="ApiPlatform\Core\Bridge\Doctrine\Orm\Extension\OrderExtension" alias="api_platform.doctrine.orm.query_extension.order" />
+        <service id="Doctrine\Common\Persistence\ManagerRegistry" alias="doctrine" />
     </services>
 
 </container>

tests/Bridge/Symfony/Bundle/DependencyInjection/ApiPlatformExtensionTest.php

@@ -38,6 +38,7 @@
 use ApiPlatform\Core\Tests\Fixtures\TestBundle\TestBundle;
 use ApiPlatform\Core\Validator\ValidatorInterface;
 use Doctrine\Bundle\DoctrineBundle\DoctrineBundle;
+use Doctrine\Common\Persistence\ManagerRegistry;
 use FOS\UserBundle\FOSUserBundle;
 use Nelmio\ApiDocBundle\NelmioApiDocBundle;
 use PHPUnit\Framework\TestCase;
@@ -735,6 +736,7 @@ private function getBaseContainerBuilderProphecy()
             PaginationExtension::class => 'api_platform.doctrine.orm.query_extension.pagination',
             OrderExtension::class => 'api_platform.doctrine.orm.query_extension.order',
             ValidatorInterface::class => 'api_platform.validator',
+            ManagerRegistry::class => 'doctrine',
         ];
 
         foreach ($aliases as $alias => $service) {