bug #44359 Avoid duplicated session listener registration in tests (alexander-schranz)

This PR was squashed before being merged into the 5.4 branch.

Discussion
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Avoid duplicated session listener registration in tests

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix #44345
| License       | MIT
| Doc PR        | -

Avoid duplicated session listener registration in tests.

Commits
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366cb1ad3a Avoid duplicated session listener registration in tests

Author: nicolas-grekas

DependencyInjection/FrameworkExtension.php

@@ -350,6 +350,11 @@ public function load(array $configs, ContainerBuilder $container)
 
             $this->sessionConfigEnabled = true;
             $this->registerSessionConfiguration($config['session'], $container, $loader);
+            if (!empty($config['test'])) {
+                // test listener will replace the existing session listener
+                // as we are aliasing to avoid duplicated registered events
+                $container->setAlias('session_listener', 'test.session.listener');
+            }
         } elseif (!empty($config['test'])) {
             $container->removeDefinition('test.session.listener');
         }