Update CHANGES.txt for recent commits to 2.7 and 2.6 (cherry picked from commit c77c35f83ce953005fe0d3334acf0f0013a82139)
Update CHANGES.txt for recent commits to 2.7 and 2.6
(cherry picked from commit c77c35f83ce953005fe0d3334acf0f0013a82139)

zrccxyb62/hadoop,zrccxyb62/hadoop,zrccxyb62/hadoop,zrccxyb62/hadoop,zrccxyb62/hadoop,zrccxyb62/hadoop,zrccxyb62/hadoop