Major Description
ObservationTest.applyNodeTypeOnSelf sometimes fails - it can be reproduced by stepping through the method (thus slowing things down):
applyNodeTypeOnSelf[SegmentTar](org.apache.jackrabbit.oak.jcr.observation.ObservationTest): Unexpected events: [Event{type=2, path=/test_node/a/b, identifier=/test_node/a/b, info={jcr:primaryType=oak:Unstructured}, userID=admin, userData=null, date=1478184136340, external=false}]