Check NVP router's status before deploying a service

Check NVP router's status before deploying a service

With NVP advanced service plugin, router creation is asynchronous while
all service call is synchronous, so it is possible that advanced service
request is called before edge deployment completed.
The solution is to check the router status before deploying an advanced service.
If the router is not in ACTIVE status, the service deployment request would return
"Router not in 'ACTIVE' status" error.

Change-Id: Idde71c37f5d5c113ac04376ed607e0c156b07477
Closes-Bug: #1298865