message: Enhance the exception for body stream rewind
diff: @@ -68,7 +68,10 @@ namespace Azure { namespace Core { namespace Http {
  */
  virtual void Rewind()
  {
  - throw "Not Implemented"; // TODO: Replace with best practice as defined by guideline
  + // Exception is not meant to be caught. This is rather an indication of a bad program that
  + // needs to be updated. This is the reason of using `throw` alone.
  + throw "The upload BodyStream doesn't support Rewind which is required to guarantee fault "
  + "tolerance when retrying the operation.";
  };
  /**
  