Test suite could fail due to conflicting actions of tests #137
Description
Describe the bug
Test cases could fail due to conflicting actions from other test cases. As we use the very same data for different test runs, it could happen that a test in stage delete will remove data that another test needs for an update action.
With #136, we run into such an issue. This was mitigated by increasing the count of test runners running in parallel.
Expected behavior
All tests need to run without failures.
Versions:
All applicable versions.
Additional context
We should use random data for each test case to prevent deleting data in one case that another still needs.