HADOOP-13383. Update release notes for 3.0.0-alpha1.
HADOOP-13383. Update release notes for 3.0.0-alpha1.

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