Context:

There are currently multiple different writers which all write to the FlowNodeInstances list in our ProcessInstance data. 

We already have ImportMediatorPermutationIT, but those tests are more focussed on the instances as a whole: we usually have process instances with 1 userTask that is either still running or claimed and completed.

We should evaluate how to add more thorough flowNode data import (/writer) tests. To do so, we could consider adding more userTask data to the existing ImportMediatorPermutationIT or adding separate IT just for userTask import permutation testing.

Also see Backend Senate Notes: https://confluence.camunda.com/display/CO/2021-06-07+Backend+Senate?focusedTaskId=7

AT:

• Import of flowNode data is covered more extensively in IT