Translator tests

The simple configurationTest. 
And as we discussed the test for the ServiceProvider. I tried to leave out as much phpDocumentor code as possible. I think using external dependencies in tests is ok. But never use the application classes it self. 

Let me know what you think of it. 
You can make this even simpler by using demeter chain mocking with Mockery (https://github.com/padraic/mockery/blob/master/docs/15-MOCKING-DEMETER-CHAINS-AND-FLUENT-INTERFACES.md). That way you don't have to mock the Translator\Configuration object