added autoload_classmap.php and moved closure from config file to getSer...

added autoload_classmap.php for increase performance,  moved closure 'Zend\Db\Adapter\Adapter' from  config/module.config.php to Module.php because ModuleManager is not able to cache them properly. 
http://framework.zend.com/manual/2.2/en/tutorials/config.advanced.html#configuration-priority