Feature/zend test load module

The goal is to have an helper for write unit tests on module :

* for example, replace the setup of : https://github.com/blanchonvincent/SimpleMemoryShared/blob/master/tests/SimpleMemoryShared/MemorySharedManagerTest.php
* can load specific config like on this issue : https://github.com/zendframework/zf2/issues/3845