TEZ-1742. Improve response time of internal preemption (bikas)
(cherry picked from commit 5df90046c494352b55dbffe2fbd6810516d486e7)

Conflicts:
	CHANGES.txt
TEZ-1742. Addendum to fix CHANGES.txt
(cherry picked from commit 8492f10757f9134016f8149f2cc54061d8ddbb0a)

Conflicts:
	CHANGES.txt
TEZ-1742 addendum patch for follow up comments
(cherry picked from commit c6c08c18b77870e71298adb2dc51908473434768)