TEZ-1673. Update the default value for allowed node failures, num events
per heartbeat and counter update interval. (sseth)
(cherry picked from commit 749062d820b4f602ac44b2ac2884107cdbcc50f7)
TEZ-1462. Remove unnecessary SuppressWarnings. (Alexander Pivovarov via hitesh)

(cherry picked from commit 18b29713acb3a01d67f4591eeadd5baafa196484)
TEZ-1633. Fixed expected values in TestTaskRecovery.testRecovery_OneTAStarted. (Alexander Pivovarov and Jeff Zhang via hitesh)

(cherry picked from commit b37ce2cd872155eb1f2e8da56e7afb823b908874)
TEZ-1669. yarn-swimlanes.sh throws error post TEZ-1556. (Rajesh Balamohan via hitesh)

(cherry picked from commit 9577195f6897d5eb24cf19361a23ca911f7a48cd)
TEZ-1633. Addendum patch. Fixed expected values in TestTaskRecovery.testRecovery_OneTAStarted. (Alexander Pivovarov and Jeff Zhang via hitesh)

(cherry picked from commit c942d0ca730731d07818040b635e98ef7d9ef5da)
TEZ-1682. Tez AM hangs at times when there are task failures. (sseth)
(cherry picked from commit 9220170dd87e26542bcfe3bbdc29871625535e1f)