[midPoint-git] [Evolveum/midpoint] 306780: Add asserts for wrong opResult.message yield

[mederly]

  Branch: refs/heads/master
  Home:   https://github.com/Evolveum/midpoint
  Commit: 3067800204f6ed9cc137ff7a091dd33167bdfcf0
      https://github.com/Evolveum/midpoint/commit/3067800204f6ed9cc137ff7a091dd33167bdfcf0
  Author: Pavol Mederly <mederly at evolveum.com>
  Date:   2020-10-01 (Thu, 01 Oct 2020)

  Changed paths:
    M repo/repo-test-util/src/main/java/com/evolveum/midpoint/test/AbstractIntegrationTest.java
    M testing/story/src/test/java/com/evolveum/midpoint/testing/story/consistency/TestConsistencyMechanism.java

  Log Message:
  -----------
  Add asserts for wrong opResult.message yield

These asserts are temporary. In the future, specific description
should be there. But current string of "null" is the worst solution.