TEZ-1745. TestATSHistoryLoggingService::testATSHistoryLoggingServiceShutdown can be flaky. (hitesh)

(cherry picked from commit 71ca74e0e8e9e59dd1490961cc15482487cdbec8)

Conflicts:
	CHANGES.txt
TEZ-1747. Increase test timeout for TestSecureShuffle (Rajesh Balamohan)
(Cherry picked from commit 7c6085d24a2e8fa7a58b2fa32c47d283ca2b046f)
TEZ-1746. Flaky test in TestVertexImpl and TestExceptionPropagation. (zjffdu)

(cherry picked from commit 873b247bbdc930572d08b29aef84d8cb65d4c16d)