Yes you can use the camel integration for jBPM5 as well.
What exactly do you want to do? what do you mean with: "make an outgoing call from jbpm through camel" do you want to call an external service that is a camel endpoint?
You can do that without using the camel integration. You just need to create a custom workitem that calls that camel endpoint and that's it.
Look for domain specific activities inside the documentation