Clean up drools-camel dependencies.

Hi

I took a look at drools-camel and would like to help cleanup the code a bit.

At first we should use the correct dependencies for unit testing with the Camel Test Kit.
So we should use camel-test and NOT camel-core-test. The latter is only used internally in the Camel project itself (in fact we use it to test the same tests with Spring as we do with camel-core).