Ask discussed in the BE senate: https://confluence.camunda.com/display/CO/2021-06-07+Backend+Senate

We are getting illegal access warnings recently since updating to JDK 11. Some may be caused by Mockito's use of reflection to support JDK 8. We might be able to resolve some of these by instead using mockito-inline. At the same time, we could benefit from the additional experimentation features.