merged branch fabpot/bundle-leaks (PR #8947)

This PR was merged into the master branch.

Discussion
----------

[HttpKernel] fixes some memory leaks

| Q             | A
| ------------- | ---
| Bug fix?      | kinda
| New feature?  | no
| BC breaks?    | kinda as the Bundle `$reflected` property was removed
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Commits
-------

6307f41 [HttpKernel] removed a circular reference that prevents PHP GC to do its job
49fe3c7 [HttpKernel] removed the need to use reflection to get a bundle namespace

Author: fabpot

src/Symfony/Component/HttpKernel/Bundle/Bundle.php

@@ -29,8 +29,8 @@
 abstract class Bundle extends ContainerAware implements BundleInterface
 {
     protected $name;
-    protected $reflected;
     protected $extension;
+    protected $path;
 
     /**
      * Boots the Bundle.
@@ -109,11 +109,9 @@ public function getContainerExtension()
      */
     public function getNamespace()
     {
-        if (null === $this->reflected) {
-            $this->reflected = new \ReflectionObject($this);
-        }
+        $class = get_class($this);
 
-        return $this->reflected->getNamespaceName();
+        return substr($class, 0, strrpos($class, '\\'));
     }
 
     /**
@@ -125,11 +123,12 @@ public function getNamespace()
      */
     public function getPath()
     {
-        if (null === $this->reflected) {
-            $this->reflected = new \ReflectionObject($this);
+        if (null === $this->path) {
+            $reflected = new \ReflectionObject($this);
+            $this->path = dirname($reflected->getFileName());
         }
 
-        return dirname($this->reflected->getFileName());
+        return $this->path;
     }
 
     /**