Variables are displayed twice on Process instance variables page

On the Process Instance Variables page, the datatable displays twice the columns: `Name`, `Type` and `Value` and the process variables are listed twice.

Steps to replicate the issue:

1. In modeling application -> Import the project attached -> Release the project

2. In Admin Application -> deploy the release

3. Navigate to Process workspace and Start a new process

4. In Admin Application -> Process Admin -> Process Instances -> filter by the application name (rest-json) -> go to RUNNING Process instance Variables page

Expected result: `jsonResponse` and `url` variables are displayed only once

Actual result: Both variables are displayed 2 times and `Name`, Type`, `Value` datatable columns are doubled (see screenshot).