WaitForPnfReadyBB - set orchestration status to Register and then Registered

CoS:

• WaitForPnfReadyBB should set PNF orchestration status to:
  • Register - should be set immediately when BB starts 
  • Registered - should be set at the end of the BB after Pnf Ready event has been successfully received

How to demo:

• Run demo flow containing WaitForPnfReadyBB on some demo service model (use SO official REST API to start instantiation)
• Show in SO Monitoring that WaitForPnfReadyBB has been started
• Show in AAI that orchestration status for PNF has been set to Register
• Send Pnf Ready event and show in SO Monitoring that WaitForPnfReadyBB has successfully ended
• Show in AAI that orchestration status for PNF has been set to Registered

Arch details:

• Add separate task at the end of WaitForPnfReadyBB
• Implement and use method:
  • AAIUpdateTasks.updateOrchestrationStatusRegisterPnf()
  • AAIUpdateTasks.updateOrchestrationStatusRegisteredPnf()
• Reuse AAIPnfResources.updateOrchestrationStatusPnf() implemented in SO-2642 
• OrchestrationStatus enum needs to be extended with REGISTER and REGISTERED values