[task-relaunch] - User needs ability to remove task property

[cppwfs]

Currently users can't remove task properties when relaunching a task. This was the original intent of the application, but after user feedback, users want the ability to remove task properties when relaunching a task. Currently, if the user launches a task and the property is not in the request, it is re-added. This will require changes in the task launcher of data flow.

More on this issue can be seen here: https://github.com/spring-cloud/spring-cloud-dataflow-ui/issues/1730

[Kim-menu]

There isn't any way to remove previous task(platform) property now. right?

[Manu10744]

No. what the fuck....

[mrairzuk]

This issue is actually so bad... Wanted to add a possibility for my app to use an optional timestamp from task properties, but ended up with no option to remove it for subsequent launches...