Clear bound events when calling reset().

Events will retain instances that should have been destroyed. Clear
bound events when emptying a registry.

lib/Cake/Controller/ComponentRegistry.php

@@ -111,4 +111,18 @@ protected function _create($class, $settings) {
 		return $instance;
 	}
 
+/**
+ * Destroys all objects in the registry.
+ *
+ * Removes all attached listeners and destroys all stored instances.
+ *
+ * @return void
+ */
+	public function reset() {
+		foreach ($this->_loaded as $component) {
+			$this->_eventManager->detach($component);
+		}
+		parent::reset();
+	}
+
 }

lib/Cake/Test/TestCase/Controller/ComponentRegistryTest.php

@@ -172,13 +172,19 @@ public function testGetController() {
  * @return void
  */
 	public function testReset() {
-		$instance = $this->Components->load('Paginator');
+		$eventManager = $this->Components->getController()->getEventManager();
+		$instance = $this->Components->load('Auth');
 		$this->assertSame(
 			$instance,
-			$this->Components->Paginator,
+			$this->Components->Auth,
 			'Instance in registry should be the same as previously loaded'
 		);
+		$this->assertCount(1, $eventManager->listeners('Controller.startup'));
+
 		$this->assertNull($this->Components->reset(), 'No return expected');
-		$this->assertNotSame($instance, $this->Components->load('Paginator'));
+		$this->assertCount(0, $eventManager->listeners('Controller.startup'));
+
+		$this->assertNotSame($instance, $this->Components->load('Auth'));
 	}
+
 }

lib/Cake/Test/TestCase/View/HelperRegistryTest.php

@@ -188,4 +188,23 @@ public function testLoadPluginHelper() {
 		App::build();
 	}
 
+/**
+ * Test reset.
+ *
+ * @return void
+ */
+	public function testReset() {
+		$instance = $this->Helpers->load('Paginator');
+		$this->assertSame(
+			$instance,
+			$this->Helpers->Paginator,
+			'Instance in registry should be the same as previously loaded'
+		);
+		$this->assertCount(1, $this->Events->listeners('View.beforeRender'));
+
+		$this->assertNull($this->Helpers->reset(), 'No return expected');
+		$this->assertCount(0, $this->Events->listeners('View.beforeRender'));
+
+		$this->assertNotSame($instance, $this->Helpers->load('Paginator'));
+	}
 }

lib/Cake/View/HelperRegistry.php

@@ -150,4 +150,18 @@ protected function _create($class, $settings) {
 		return $instance;
 	}
 
+/**
+ * Destroys all objects in the registry.
+ *
+ * Removes all attached listeners and destroys all stored instances.
+ *
+ * @return void
+ */
+	public function reset() {
+		foreach ($this->_loaded as $helper) {
+			$this->_eventManager->detach($helper);
+		}
+		parent::reset();
+	}
+
 }