Issue990Bug6ValidateContentTypeAsMalformedSyntaxErrorRemoveExplicitCause (#82)

-modify createFSPIOPErrorFromErrorResponse add case for 415 to handle Content-Type validation as malformed syntax error
-remove explicit cause added as extension and instead send the response stack as the cause fo the createFSPIOPError

Author: gibaros

src/handler.js

@@ -47,14 +47,15 @@ const createFSPIOPErrorFromErrorResponse = (request, response) => {
       case 404:
         return Errors.UNKNOWN_URI
 
+      case 415:
+        return Errors.MALFORMED_SYNTAX
+
       default:
         return Errors.INTERNAL_SERVER_ERROR
     }
   })(response.output.statusCode)
 
-  return Factory.createFSPIOPError(fspiopError, response.message, response, getReplyToFromRequestHeaders(request), [
-    { key: 'cause', value: response.stack }
-  ])
+  return Factory.createFSPIOPError(fspiopError, response.message, response.stack, getReplyToFromRequestHeaders(request))
 }
 
 const reformatError = (request, response) => {