Merge pull request #16534 from jklimke/add_options_to_unmanaged_transaction_call_for_sequelize

Add options to unmanaged transaction call for sequelize

types/sequelize/sequelize-tests.ts

@@ -1626,6 +1626,18 @@ s.transaction().then( function( t ) {
 
 } );
 
+s.transaction({
+    isolationLevel: s.Transaction.ISOLATION_LEVELS.READ_COMMITTED
+    }).then(function(t2) {
+        return User.find({
+                where: {
+                    username: 'jan'
+                },
+                lock: t2.LOCK.UPDATE,
+                transaction: t2
+            });
+    });
+
 s.transaction( function() {
     return Bluebird.resolve();
 } );