Fix Ajv configuration for 6.x

Author: ankon

index.js

@@ -17,7 +17,7 @@ var revalidator = require('revalidator');
 var jsonGate = require('json-gate');
 var jsen = require('jsen');
 var schemasaurus = require('schemasaurus');
-var ajv = require('ajv')();
+var ajv = require('ajv')({schemaId: 'auto'});
 var djv = require('djv')();
 var jsvg = require('json-schema-validator-generator').default;
 var jlib = require("json-schema-library");