Add depedency between capability manager and bootstrap for load_artifact step to run before

We need to add dependency between bootstrap and capability manager service to make sure load_artifact step runs before we kick off capability manager. This ensures that capability manager starts capability with latest available artifact.

Similar to https://github.com/cdapio/cdap/blob/develop/cdap-app-fabric/src/main/java/io/cdap/cdap/internal/bootstrap/BootstrapService.java#L93

We need to find a better way to co-ordinate between threads/loading steps.