Update CHANGES.txt to reflect commit of HADOOP-8436 to 2.8.0
Update CHANGES.txt to reflect commit of HADOOP-8436 to 2.8.0

plusplusjiajia/hadoop,lukmajercak/hadoop,huafengw/hadoop,ouyangjie/hadoop,GeLiXin/hadoop,GeLiXin/hadoop,djalova/hadoop,f7753/hadoop,nandakumar131/hadoop,dennishuo/hadoop,steveloughran/hadoop,adouang/hadoop,ctrezzo/hadoop,JingchengDu/hadoop,nandakumar131/hadoop,ouyangjie/hadoop,Ethanlm/hadoop,ronny-macmaster/hadoop,littlezhou/hadoop,steveloughran/hadoop,bitmybytes/hadoop,legend-hua/hadoop,f7753/hadoop,mapr/hadoop-common,WIgor/hadoop,xiao-chen/hadoop,bitmybytes/hadoop,huafengw/hadoop,apache/hadoop,GeLiXin/hadoop,mapr/hadoop-common,littlezhou/hadoop,huafengw/hadoop,anjuncc/hadoop,wwjiang007/hadoop,sroegner/hadoop,legend-hua/hadoop,sroegner/hadoop,djalova/hadoop,lukmajercak/hadoop,cnfire/hadoop,ronny-macmaster/hadoop,StephanieMak/hadoop,ChetnaChaudhari/hadoop,ucare-uchicago/hadoop,adouang/hadoop,apache/hadoop,plusplusjiajia/hadoop,ronny-macmaster/hadoop,mapr/hadoop-common,ronny-macmaster/hadoop,StephanieMak/hadoop,f7753/hadoop,huafengw/hadoop,steveloughran/hadoop,wenxinhe/hadoop,cnfire/hadoop,steveloughran/hadoop,djalova/hadoop,JingchengDu/hadoop,wwjiang007/hadoop,ronny-macmaster/hadoop,ucare-uchicago/hadoop,xiao-chen/hadoop,xiao-chen/hadoop,Winiex/hadoop,samuelan/hadoop,legend-hua/hadoop,nandakumar131/hadoop,ChetnaChaudhari/hadoop,mapr/hadoop-common,dennishuo/hadoop,f7753/hadoop,wwjiang007/hadoop,bitmybytes/hadoop,szegedim/hadoop,pkit/hadoop,ctrezzo/hadoop,huafengw/hadoop,cnfire/hadoop,djalova/hadoop,dennishuo/hadoop,plusplusjiajia/hadoop,dierobotsdie/hadoop,anjuncc/hadoop,StephanieMak/hadoop,sroegner/hadoop,apurtell/hadoop,wwjiang007/hadoop,ctrezzo/hadoop,StephanieMak/hadoop,sroegner/hadoop,wenxinhe/hadoop,dierobotsdie/hadoop,huafengw/hadoop,dennishuo/hadoop,Winiex/hadoop,Ethanlm/hadoop,979969786/hadoop,plusplusjiajia/hadoop,GeLiXin/hadoop,979969786/hadoop,soumabrata-chakraborty/hadoop,adouang/hadoop,apurtell/hadoop,nandakumar131/hadoop,lukmajercak/hadoop,littlezhou/hadoop,Winiex/hadoop,apache/hadoop,szegedim/hadoop,Winiex/hadoop,ChetnaChaudhari/hadoop,littlezhou/hadoop,sujeetv/hadoop,pkit/hadoop,ctrezzo/hadoop,StephanieMak/hadoop,anjuncc/hadoop,WIgor/hadoop,wwjiang007/hadoop,dierobotsdie/hadoop,pkit/hadoop,szegedim/hadoop,StephanieMak/hadoop,mapr/hadoop-common,Winiex/hadoop,soumabrata-chakraborty/hadoop,Ethanlm/hadoop,JingchengDu/hadoop,Ethanlm/hadoop,lukmajercak/hadoop,sujeetv/hadoop,huafengw/hadoop,mapr/hadoop-common,sujeetv/hadoop,ucare-uchicago/hadoop,samuelan/hadoop,ucare-uchicago/hadoop,Winiex/hadoop,ChetnaChaudhari/hadoop,979969786/hadoop,ChetnaChaudhari/hadoop,anjuncc/hadoop,nandakumar131/hadoop,anjuncc/hadoop,szegedim/hadoop,apurtell/hadoop,xiao-chen/hadoop,WIgor/hadoop,steveloughran/hadoop,legend-hua/hadoop,pkit/hadoop,szegedim/hadoop,nandakumar131/hadoop,ucare-uchicago/hadoop,steveloughran/hadoop,sujeetv/hadoop,cnfire/hadoop,dierobotsdie/hadoop,djalova/hadoop,GeLiXin/hadoop,sujeetv/hadoop,plusplusjiajia/hadoop,cnfire/hadoop,samuelan/hadoop,ChetnaChaudhari/hadoop,apache/hadoop,ucare-uchicago/hadoop,bitmybytes/hadoop,ctrezzo/hadoop,apache/hadoop,adouang/hadoop,ouyangjie/hadoop,wenxinhe/hadoop,legend-hua/hadoop,lukmajercak/hadoop,samuelan/hadoop,xiao-chen/hadoop,GeLiXin/hadoop,anjuncc/hadoop,apurtell/hadoop,djalova/hadoop,Ethanlm/hadoop,Ethanlm/hadoop,samuelan/hadoop,ctrezzo/hadoop,sroegner/hadoop,szegedim/hadoop,pkit/hadoop,Winiex/hadoop,WIgor/hadoop,ucare-uchicago/hadoop,wenxinhe/hadoop,adouang/hadoop,mapr/hadoop-common,StephanieMak/hadoop,plusplusjiajia/hadoop,WIgor/hadoop,ouyangjie/hadoop,wenxinhe/hadoop,soumabrata-chakraborty/hadoop,f7753/hadoop,dennishuo/hadoop,sroegner/hadoop,samuelan/hadoop,sroegner/hadoop,JingchengDu/hadoop,pkit/hadoop,apache/hadoop,soumabrata-chakraborty/hadoop,ouyangjie/hadoop,anjuncc/hadoop,ChetnaChaudhari/hadoop,adouang/hadoop,wwjiang007/hadoop,979969786/hadoop,979969786/hadoop,sujeetv/hadoop,sujeetv/hadoop,plusplusjiajia/hadoop,nandakumar131/hadoop,Ethanlm/hadoop,bitmybytes/hadoop,979969786/hadoop,soumabrata-chakraborty/hadoop,GeLiXin/hadoop,ronny-macmaster/hadoop,cnfire/hadoop,dierobotsdie/hadoop,WIgor/hadoop,djalova/hadoop,soumabrata-chakraborty/hadoop,JingchengDu/hadoop,ctrezzo/hadoop,littlezhou/hadoop,ouyangjie/hadoop,JingchengDu/hadoop,soumabrata-chakraborty/hadoop,apurtell/hadoop,wenxinhe/hadoop,dennishuo/hadoop,bitmybytes/hadoop,szegedim/hadoop,wwjiang007/hadoop,lukmajercak/hadoop,WIgor/hadoop,xiao-chen/hadoop,samuelan/hadoop,xiao-chen/hadoop,littlezhou/hadoop,979969786/hadoop,JingchengDu/hadoop,dennishuo/hadoop,ronny-macmaster/hadoop,legend-hua/hadoop,steveloughran/hadoop,pkit/hadoop,lukmajercak/hadoop,f7753/hadoop,legend-hua/hadoop,f7753/hadoop,wenxinhe/hadoop,cnfire/hadoop,dierobotsdie/hadoop,ouyangjie/hadoop,apache/hadoop,littlezhou/hadoop,apurtell/hadoop,apurtell/hadoop,dierobotsdie/hadoop,bitmybytes/hadoop,adouang/hadoop