MarkerTest.testMarkerDeltasMoveFile fails infrequently,
due to unexpected deltas received by the test resource change listener.
The expected cause is a race condition, likely a parallel job
notifying about the resource delta instead of the test main thread.

This change adds logging for resource deltas, including the thread
which notifies about the resource delta. This information hopefully
helps to identify the potential race condition.

See: #2569