Changes to Resize VM

removed the optional property billing/credits_applied from the response with the 200 status

added the media type application/json for the response with the status 402

added the new required request property pricing_id

removed the request property cpu

removed the request property ram

added the non-success response with the status 402

added the optional property billing to the response with the 200 status

added the optional property id to the response with the 200 status