general architecture java code structure

What this boils down to is: We have two "kinds" of modules in ./clc/modules:

1. Library code: this code is at the root of the dependency tree and can't have forward references to module kind #2

2. Service/Component code: this code provides the implementation of some service or component. These are made up of two parts:

  2.1 service-common directory: client code, these are types which must be shared and available to interact with, configure, reference the service; e.g., message types, component ids, service registration handling.  these should never include service implementation code, nor should there be a build order between these directories (i.e., there shouldn't be dependencies between the 
  2.2 service directory:  this code does whatever the service does