[TDD] Added excepton test - throw variable

https://github.com/phalcon/cphalcon/blob/2.0.0/phalcon/mvc/dispatcher.zep#L156

Actual:
<b>Fatal error</b>:  Class '\exception' not found in <b>/home/ovr/projects/technologymaze/phalcon-rest-api/vendor/ovr/phalcony/src/Rest/Dispatcher.php</b> on line <b>46</b><br />

Expected:
normal exception