Fixup CHANGES.txt to reflect recent commits to 2.7.2 and 2.6.2
Fixup CHANGES.txt to reflect recent commits to 2.7.2 and 2.6.2

WIgor/hadoop,legend-hua/hadoop,mapr/hadoop-common,mapr/hadoop-common,ronny-macmaster/hadoop,Ethanlm/hadoop,dierobotsdie/hadoop,wenxinhe/hadoop,szegedim/hadoop,xiao-chen/hadoop,apurtell/hadoop,xiao-chen/hadoop,Ethanlm/hadoop,xiao-chen/hadoop,ronny-macmaster/hadoop,ucare-uchicago/hadoop,ucare-uchicago/hadoop,ronny-macmaster/hadoop,bitmybytes/hadoop,ChetnaChaudhari/hadoop,plusplusjiajia/hadoop,legend-hua/hadoop,plusplusjiajia/hadoop,JingchengDu/hadoop,xiao-chen/hadoop,wwjiang007/hadoop,ucare-uchicago/hadoop,plusplusjiajia/hadoop,lukmajercak/hadoop,lukmajercak/hadoop,Ethanlm/hadoop,soumabrata-chakraborty/hadoop,ronny-macmaster/hadoop,dennishuo/hadoop,WIgor/hadoop,xiao-chen/hadoop,979969786/hadoop,lukmajercak/hadoop,lukmajercak/hadoop,xiao-chen/hadoop,wwjiang007/hadoop,dierobotsdie/hadoop,mapr/hadoop-common,Ethanlm/hadoop,dierobotsdie/hadoop,dierobotsdie/hadoop,steveloughran/hadoop,dennishuo/hadoop,littlezhou/hadoop,steveloughran/hadoop,Ethanlm/hadoop,soumabrata-chakraborty/hadoop,mapr/hadoop-common,soumabrata-chakraborty/hadoop,WIgor/hadoop,dierobotsdie/hadoop,ChetnaChaudhari/hadoop,979969786/hadoop,JingchengDu/hadoop,ctrezzo/hadoop,979969786/hadoop,GeLiXin/hadoop,littlezhou/hadoop,steveloughran/hadoop,GeLiXin/hadoop,Ethanlm/hadoop,steveloughran/hadoop,WIgor/hadoop,mapr/hadoop-common,plusplusjiajia/hadoop,szegedim/hadoop,szegedim/hadoop,JingchengDu/hadoop,dierobotsdie/hadoop,nandakumar131/hadoop,wenxinhe/hadoop,huafengw/hadoop,apache/hadoop,979969786/hadoop,szegedim/hadoop,ctrezzo/hadoop,littlezhou/hadoop,lukmajercak/hadoop,huafengw/hadoop,apurtell/hadoop,bitmybytes/hadoop,ChetnaChaudhari/hadoop,JingchengDu/hadoop,legend-hua/hadoop,apache/hadoop,GeLiXin/hadoop,wwjiang007/hadoop,ronny-macmaster/hadoop,GeLiXin/hadoop,huafengw/hadoop,steveloughran/hadoop,ctrezzo/hadoop,bitmybytes/hadoop,wenxinhe/hadoop,soumabrata-chakraborty/hadoop,lukmajercak/hadoop,nandakumar131/hadoop,JingchengDu/hadoop,ctrezzo/hadoop,apache/hadoop,bitmybytes/hadoop,ucare-uchicago/hadoop,ucare-uchicago/hadoop,JingchengDu/hadoop,WIgor/hadoop,wenxinhe/hadoop,nandakumar131/hadoop,ctrezzo/hadoop,ChetnaChaudhari/hadoop,dierobotsdie/hadoop,ctrezzo/hadoop,ctrezzo/hadoop,legend-hua/hadoop,littlezhou/hadoop,ChetnaChaudhari/hadoop,JingchengDu/hadoop,apache/hadoop,apurtell/hadoop,steveloughran/hadoop,GeLiXin/hadoop,legend-hua/hadoop,ChetnaChaudhari/hadoop,huafengw/hadoop,wwjiang007/hadoop,littlezhou/hadoop,wenxinhe/hadoop,dennishuo/hadoop,soumabrata-chakraborty/hadoop,xiao-chen/hadoop,dennishuo/hadoop,wwjiang007/hadoop,huafengw/hadoop,Ethanlm/hadoop,nandakumar131/hadoop,szegedim/hadoop,lukmajercak/hadoop,nandakumar131/hadoop,ronny-macmaster/hadoop,wwjiang007/hadoop,nandakumar131/hadoop,szegedim/hadoop,GeLiXin/hadoop,WIgor/hadoop,bitmybytes/hadoop,huafengw/hadoop,nandakumar131/hadoop,plusplusjiajia/hadoop,mapr/hadoop-common,bitmybytes/hadoop,ronny-macmaster/hadoop,huafengw/hadoop,apurtell/hadoop,legend-hua/hadoop,littlezhou/hadoop,soumabrata-chakraborty/hadoop,szegedim/hadoop,ChetnaChaudhari/hadoop,apurtell/hadoop,plusplusjiajia/hadoop,apurtell/hadoop,steveloughran/hadoop,979969786/hadoop,wenxinhe/hadoop,979969786/hadoop,dennishuo/hadoop,mapr/hadoop-common,apache/hadoop,979969786/hadoop,WIgor/hadoop,wenxinhe/hadoop,ucare-uchicago/hadoop,wwjiang007/hadoop,ucare-uchicago/hadoop,apache/hadoop,plusplusjiajia/hadoop,GeLiXin/hadoop,dennishuo/hadoop,bitmybytes/hadoop,dennishuo/hadoop,littlezhou/hadoop,apache/hadoop,apurtell/hadoop,legend-hua/hadoop,soumabrata-chakraborty/hadoop