restore 'unused methods' since they are used in tests

lib/dialects/abstract/query-generator.js

@@ -1090,8 +1090,12 @@ module.exports = (function() {
         if (options.keysEscaped) {
           _key = key
         } else {
+          if(this.isAssociationFilter(key, dao, options)){
+            _key = key = this.getAssociationFilterColumn(key, dao, options);
+          } else {
             _key = this.quoteIdentifiers(key)
           }
+        }
 
         if (Array.isArray(value)) {
           result.push(this.arrayValue(value, key, _key, dao, "IN"))