Scenario:
1. Create a new task and assign it to a user during the creation
2. Then the user is granted with READ and UPDATE/TASK_WORK permission for this specific task

Expected:
The user is granted with READ_VARIABLE permission as well in case the enforceSpecificVariablePermission config is enabled.

Cases:

• on a new assignment
• on setting an owner
• on adding a user identity link
• on adding a group identity link