Changes to Post Stake Intent

the code response's property type changed from string to integer, and format from no format to int32 for status 401

the code response's property type changed from string to integer, and format from no format to int32 for status 500

the code response's property type changed from string to integer, and format from no format to int32 for status 503

removed the optional property details from the response with the 401 status

removed the optional property details from the response with the 500 status

removed the optional property details from the response with the 503 status