* v6 udpate: Test gRPC services with gRPCurl: doc and samples
* Updated powershell examples to use <port> rather than 5001 and explained where to get the port number
* Apply suggestions from code review
Removed duplicated info on port per James's suggestion.
Co-authored-by: James Newton-King <james@newtonking.com>
Co-authored-by: James Newton-King <james@newtonking.com>