How to add a new metadata in a Task

Let's say we're going to add a new field named, "Custom". This field will be available only in activity task.
This is done in 3 steps:

1. Modify the Activity Task with a new field, as well as a getter and setter for it.
   
2. Then, change the message content in the TMS WSDL
   
3. Compile and redeploy tms-service as described in the build section. TMS is an .aar file, you can drop/replace it in the axis webapp of the server.
4. Compile and redeploy ui-fw with the newly modified task. UI-FW comes in a war file.
5. Finally, add a new column in the activity tab of the UI-FW in tasks.jsp and updates.jsp