MDL-51531 libraries: Upgrade google libraries to 1.1.5

lib/google/src/Google/Http/CacheParser.php

@@ -15,12 +15,13 @@
  * limitations under the License.
  */
 
-require_once realpath(dirname(__FILE__) . '/../../../autoload.php');
+if (!class_exists('Google_Client')) {
+  require_once dirname(__FILE__) . '/../autoload.php';
+}
 
 /**
  * Implement the caching directives specified in rfc2616. This
  * implementation is guided by the guidance offered in rfc2616-sec13.
- * @author Chirag Shah <[email protected]>
  */
 class Google_Http_CacheParser
 {