updated concert client messages for state handling.
messages supporting the conductor graph publication for testing, debugging.
status now as a latched publisher.
refactoring idle -> uninvited to match existing concert messages.
collapose redundancies across msg and srv for Status.
App->Rapp, variables matching from rapp manager to concert and eliminating old msgs.
eliminate redundant rapp_status and use uri's properly.
no longer used GetStatus service (deprecated in favour of the latched
Status publisher) removed.