fix: make sure options.tableNames is properly populated

lib/model.js

@@ -696,7 +696,6 @@ module.exports = (function() {
     });
 
     _.assign(options, queryOptions);
-    options.tableNames = Object.keys(tableNames);
 
     return Promise.bind(this).then(function() {
       conformOptions(options);
@@ -740,6 +739,7 @@ module.exports = (function() {
         return this.runHooks('beforeFindAfterOptions', options);
       }
     }).then(function() {
+      options.tableNames = Object.keys(tableNames);
       return this.QueryInterface.select(this, this.getTableName(options), options);
     }).tap(function(results) {
       if (options.hooks) {