RoutesParser does not invoke method extractControllerNameFrom in all cases

The VRaptor [documentation](http://www.vraptor.org/en/docs/components/#changing-default-uri) references that is possible to override the convention, but when is used the @Path annotation it's not invoking the method.

More details: https://github.com/caelum/vraptor4/pull/673
Because this, I did a PR. Maybe an ignorant solution. :unamused: 

But I think the #678 can be closed. Thanks