TEZ-1647. Issue with caching of events in VertexManager::onRootVertexInitialized. (Jeff Zhang via hitesh)
TEZ-1470. Recovery fails due to TaskAttemptFinishedEvent being recorded multiple times for the same task. (Jeff Zhang via hitesh)
TEZ-1649. ShuffleVertexManager auto reduce parallelism can cause jobs to hang indefinitely  (Rajesh Balamohan)
TEZ-1579. MR examples should be setting mapreduce.framework.name to
yarn-tez. Contributed by Krisztian Horvath.
TEZ-1566. Reduce log verbosity  (Rajesh Balamohan)
TEZ-1608. TopK example using the native TEZ api

Signed-off-by: Krisztian Horvath <krisztian.horvath@sequenceiq.com>