Fix incorrect class instantiation in namespaces

qa-src/Storage/FileCacheDriver.php

@@ -235,8 +235,8 @@ class FileCacheDriver implements CacheDriver
 
 		$totalFiles = 0;
 		$totalBytes = 0;
-		$dirIter = new RecursiveDirectoryIterator($this->cacheDir);
-		foreach (new RecursiveIteratorIterator($dirIter) as $file) {
+		$dirIter = new \RecursiveDirectoryIterator($this->cacheDir);
+		foreach (new \RecursiveIteratorIterator($dirIter) as $file) {
 			if (strpos($file->getFilename(), '.') === 0) {
 				// TODO: use FilesystemIterator::SKIP_DOTS once we're on minimum PHP 5.3
 				continue;

qa-src/Storage/MemcachedDriver.php

@@ -49,7 +49,7 @@ class MemcachedDriver implements CacheDriver
 		}
 
 		if (extension_loaded('memcached')) {
-			$this->memcached = new Memcached;
+			$this->memcached = new \Memcached;
 			$this->memcached->addServer(self::HOST, self::PORT);
 			if ($this->memcached->set($this->keyPrefix . 'test', 'TEST')) {
 				$this->enabled = true;