Acceptance Criteria (Required on creation):

• The test sometimes fails with

  RepositoryService$$EnhancerByMockitoWithCGLIB$$66a546dc cannot be returned by getIdentityService()
  getIdentityService() should return IdentityService
  ***
  If you're unsure why you're getting above error read on.
  Due to the nature of the syntax above problem might occur because:
  1. This exception *might* occur in wrongly written multi-threaded tests.
     Please refer to Mockito FAQ on limitations of concurrency testing.
  2. A spy is stubbed using when(spy.foo()).then() syntax. It is safer to stub spies - 
     - with doReturn|Throw() family of methods. More in javadocs for Mockito.spy() method.
  

Hints (Optional):

• My assumption is that there is some kind of race condition between Tomcat using the Mocks (e.g. by calling the servlet filters and the test setting them up in @Before)
• e.g. https://ci.cambpm.camunda.cloud/view/all/job/7.14/view/Broken/job/7.14-engine-rest-UNIT-resteasy3/ fails with this, also the resteasy profile
• In the two example failures I saw, this was in NoServletAuthenticationFilterTest.testFailingAuthenticationCheck