Pull request for kie module deployment builder

I developed this code for the `kie-remote` modules in the 6.0.x branch, because it was very helpful when unit testing: I could programmatically call the `KieModuleDeploymentHelper` instance to create a kjar and then use the REST/JMS services to deploy it. 

However, for obvious reasons, the code doesn't belong in the (`droolsjbpm-integration/kie-remote/kie-services-client`) but I'd like to keep it, since I think it would be useful. 

If the PR is approved, I'll add documentation as well (to `kie-docs`). 

The 6.0.x code (in `kie-services-client`) can be found [here](https://github.com/droolsjbpm/droolsjbpm-integration/tree/6.0.x/kie-remote/kie-services-client/src/main/java/org/kie/services/client/deployment).