HDFS-8523. Remove usage information on unsupported operation 'fsck -showprogress' from branch-2 (Contributed by J.Andreina)
HDFS-8523. Remove usage information on unsupported operation 'fsck -showprogress' from branch-2 (Contributed by J.Andreina)

Merged CHANGES.txt from branch-2.7

(cherry picked from commit 0ed9c2d8fec93b5dac9c305eda272ad8dfd869a9)

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md

(cherry picked from commit dd98cfd328dddb01a1220786d28a80195021611b)

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md

binn-yang/hadoop,sasa233/hadoop,likaiwalkman/hadoop,f7753/hadoop,vlajos/hadoop,zengzhaozheng/hadoop,yanbit/hadoop,EdwinChanYi/hadoop,ChetnaChaudhari/hadoop,hastimal/hadoop,IBYoung/hadoop,WIgor/hadoop,lawrencewu/hadoop,lzo/hadoop,leftnoteasy/hadoop-1,lightslife/hadoop,EdwinChanYi/hadoop,binn-yang/hadoop,soumabrata-chakraborty/hadoop,pkdevbox/hadoop,dierobotsdie/hadoop,1tylermitchell/hadoop,leftnoteasy/hadoop-1,pkit/hadoop,sujeetv/hadoop,979969786/hadoop,ctrezzo/hadoop,laxman-ch/hadoop,dilaver/hadoop,malli3131/hadoop-1,steveloughran/hadoop,skinzer/hadoop,WIgor/hadoop,soumabrata-chakraborty/hadoop,piaoyu/hadoop,EdwinChanYi/hadoop,OnePaaS/hadoop,dossett/hadoop,chenliang613/hadoop,legend-hua/hadoop,saydulk/hadoop,adouang/hadoop,abhishekagarwal87/hadoop,MeiSheng/hadoop,anjuncc/hadoop,legend-hua/hadoop,xiao-chen/hadoop,MeiSheng/hadoop,rohanwaghere/hadoop,skinzer/hadoop,apache/hadoop,malli3131/hadoop-1,venkateshu/hadoop,jingjidejuren/hadoop,djalova/hadoop,likaiwalkman/hadoop,qqming113/hadoop,anjuncc/hadoop,apurtell/hadoop,ouyangjie/hadoop,jjj117/hadoop,odpi/hadoop,adouang/hadoop,yanbit/hadoop,apache/hadoop,f7753/hadoop,plusplusjiajia/hadoop,allfro/hadoop,piaoyu/hadoop,dennishuo/hadoop,jjj117/hadoop,bitmybytes/hadoop,faspl/hadoop,cnfire/hadoop,likaiwalkman/hadoop,GeLiXin/hadoop,odpi/hadoop,979969786/hadoop,fullcontact/hadoop,ading1977/hadoop,faspl/hadoop,GeLiXin/hadoop,tianshouzhi/hadoop,dongjiaqiang/hadoop,jingjidejuren/hadoop,dossett/hadoop,szegedim/hadoop,rohanwaghere/hadoop,lawrencewu/hadoop,frdeso/hadoop,pkit/hadoop,chenliang613/hadoop,dierobotsdie/hadoop,cryptickp/hadoop,SwathiMystery/hadoop,dhootha/hadoop,harshavmb/hadoop,frdeso/hadoop,EdwinChanYi/hadoop,frdeso/hadoop,MeiSheng/hadoop,abhishekagarwal87/hadoop,Winiex/hadoop,vlajos/hadoop,allfro/hadoop,eonezhang/hadoop,apache/hadoop,djalova/hadoop,cnfire/hadoop,frdeso/hadoop,ronny-macmaster/hadoop,odpi/hadoop,ouyangjie/hadoop,weipinghe/hadoop,dilaver/hadoop,pkit/hadoop,OnePaaS/hadoop,venkateshu/hadoop,slchen2014/hadoop,bitmybytes/hadoop,hash-X/hadoop,yanbit/hadoop,EdwinChanYi/hadoop,MeiSheng/hadoop,JingchengDu/hadoop,ctrezzo/hadoop,grokcoder/hadoop,cryptickp/hadoop,wwjiang007/hadoop,slchen2014/hadoop,weipinghe/hadoop,zengzhaozheng/hadoop,NightWolf007/hadoop,samuelan/hadoop,OnePaaS/hadoop,MeiSheng/hadoop,xujianhai/hadoop,samuelan/hadoop,StephanieMak/hadoop,apache/hadoop,chenliang613/hadoop,hastimal/hadoop,laxman-ch/hadoop,lukmajercak/hadoop,sujeetv/hadoop,dilaver/hadoop,harshavmb/hadoop,grokcoder/hadoop,malli3131/hadoop-1,sroegner/hadoop,EasonYi/hadoop,jjj117/hadoop,lawrencewu/hadoop,littlezhou/hadoop,rohanwaghere/hadoop,littlezhou/hadoop,lzo/hadoop,malli3131/hadoop-1,apurtell/hadoop,steveloughran/hadoop,wenxinhe/hadoop,1tylermitchell/hadoop,ChetnaChaudhari/hadoop,lukmajercak/hadoop,mapr/hadoop-common,hash-X/hadoop,hastimal/hadoop,liutizhong/hadoop,flyrain/hadoop,grokcoder/hadoop,StephanieMak/hadoop,leftnoteasy/hadoop-1,gilv/hadoop,binn-yang/hadoop,fullcontact/hadoop,MeiSheng/hadoop,matrix-stone/hadoop,wwjiang007/hadoop,ouyangjie/hadoop,khiraiwa/hadoop,tianshouzhi/hadoop,mapr/hadoop-common,likaiwalkman/hadoop,eonezhang/hadoop,wenxinhe/hadoop,Winiex/hadoop,IBYoung/hadoop,Authorlove/hadoop,harshavmb/hadoop,dennishuo/hadoop,piaoyu/hadoop,vlajos/hadoop,StephanieMak/hadoop,neo-hu/hadoop,littlezhou/hadoop,taoguan/hadoop,LoQIStar/hadoop,dilaver/hadoop,anjuncc/hadoop,pkit/hadoop,cnfire/hadoop,SwathiMystery/hadoop,mapr/hadoop-common,nandakumar131/hadoop,venkateshu/hadoop,huafengw/hadoop,ucare-uchicago/hadoop,matrix-stone/hadoop,hjk41/hadoop,pritishppai/hadoop,f7753/hadoop,MobinRanjbar/hadoop,anjuncc/hadoop,f7753/hadoop,NightWolf007/hadoop,dongjiaqiang/hadoop,dongjiaqiang/hadoop,matrix-stone/hadoop,dhootha/hadoop,Elbehery/hadoop,JingchengDu/hadoop,soumabrata-chakraborty/hadoop,MetSystem/hadoop,gilv/hadoop,piaoyu/hadoop,sroegner/hadoop,WIgor/hadoop,szegedim/hadoop,yanbit/hadoop,Elbehery/hadoop,MobinRanjbar/hadoop,LoQIStar/hadoop,laxman-ch/hadoop,xujianhai/hadoop,leftnoteasy/hadoop-1,dhootha/hadoop,dilaver/hadoop,khiraiwa/hadoop,dossett/hadoop,lightslife/hadoop,1tylermitchell/hadoop,WIgor/hadoop,apurtell/hadoop,wwjiang007/hadoop,pkdevbox/hadoop,sujeetv/hadoop,tianshouzhi/hadoop,pritishppai/hadoop,chetan-anand/hadoop,bitmybytes/hadoop,wenxinhe/hadoop,sujeetv/hadoop,liutizhong/hadoop,apache/hadoop,ading1977/hadoop,malli3131/hadoop-1,dongjiaqiang/hadoop,MetSystem/hadoop,dongjiaqiang/hadoop,IBYoung/hadoop,djalova/hadoop,skinzer/hadoop,nandakumar131/hadoop,chenliang613/hadoop,flyrain/hadoop,ading1977/hadoop,fullcontact/hadoop,neo-hu/hadoop,binn-yang/hadoop,hjk41/hadoop,nandakumar131/hadoop,SwathiMystery/hadoop,wenxinhe/hadoop,Authorlove/hadoop,GeLiXin/hadoop,EdwinChanYi/hadoop,jjj117/hadoop,huafengw/hadoop,JingchengDu/hadoop,neo-hu/hadoop,abhishekagarwal87/hadoop,likaiwalkman/hadoop,ctrezzo/hadoop,1tylermitchell/hadoop,EdwinChanYi/hadoop,lzo/hadoop,piaoyu/hadoop,flyrain/hadoop,flyrain/hadoop,f7753/hadoop,allfro/hadoop,huafengw/hadoop,hash-X/hadoop,ChetnaChaudhari/hadoop,abhishekagarwal87/hadoop,steveloughran/hadoop,soumabrata-chakraborty/hadoop,dossett/hadoop,dxd132630/hadoop,wenxinhe/hadoop,tianshouzhi/hadoop,plusplusjiajia/hadoop,Authorlove/hadoop,xujianhai/hadoop,dilaver/hadoop,ouyangjie/hadoop,bitmybytes/hadoop,jingjidejuren/hadoop,chetan-anand/hadoop,djalova/hadoop,gilv/hadoop,sujeetv/hadoop,1tylermitchell/hadoop,pritishppai/hadoop,yanbit/hadoop,1tylermitchell/hadoop,dennishuo/hadoop,steveloughran/hadoop,NightWolf007/hadoop,ChetnaChaudhari/hadoop,binn-yang/hadoop,odpi/hadoop,pritishppai/hadoop,jjj117/hadoop,dxd132630/hadoop,xiao-chen/hadoop,pkit/hadoop,laxman-ch/hadoop,neo-hu/hadoop,EasonYi/hadoop,mapr/hadoop-common,ucare-uchicago/hadoop,hjk41/hadoop,legend-hua/hadoop,ouyangjie/hadoop,wwjiang007/hadoop,laxman-ch/hadoop,ctrezzo/hadoop,979969786/hadoop,chetan-anand/hadoop,dhootha/hadoop,khiraiwa/hadoop,ChetnaChaudhari/hadoop,SwathiMystery/hadoop,SwathiMystery/hadoop,lightslife/hadoop,pkdevbox/hadoop,EasonYi/hadoop,grokcoder/hadoop,tianshouzhi/hadoop,hash-X/hadoop,NightWolf007/hadoop,wenxinhe/hadoop,Winiex/hadoop,gilv/hadoop,slchen2014/hadoop,abhishekagarwal87/hadoop,matrix-stone/hadoop,flyrain/hadoop,qqming113/hadoop,ucare-uchicago/hadoop,neo-hu/hadoop,ronny-macmaster/hadoop,djalova/hadoop,dossett/hadoop,sroegner/hadoop,dilaver/hadoop,cryptickp/hadoop,Elbehery/hadoop,fullcontact/hadoop,apache/hadoop,MeiSheng/hadoop,jjj117/hadoop,ronny-macmaster/hadoop,saydulk/hadoop,venkateshu/hadoop,skinzer/hadoop,dossett/hadoop,slchen2014/hadoop,zengzhaozheng/hadoop,weipinghe/hadoop,lzo/hadoop,ading1977/hadoop,vlajos/hadoop,ucare-uchicago/hadoop,weipinghe/hadoop,MobinRanjbar/hadoop,IBYoung/hadoop,IBYoung/hadoop,LoQIStar/hadoop,WIgor/hadoop,Winiex/hadoop,taoguan/hadoop,gilv/hadoop,ctrezzo/hadoop,khiraiwa/hadoop,979969786/hadoop,harshavmb/hadoop,chetan-anand/hadoop,littlezhou/hadoop,qqming113/hadoop,ChetnaChaudhari/hadoop,sroegner/hadoop,ronny-macmaster/hadoop,frdeso/hadoop,grokcoder/hadoop,ronny-macmaster/hadoop,JingchengDu/hadoop,plusplusjiajia/hadoop,Ethanlm/hadoop,f7753/hadoop,venkateshu/hadoop,piaoyu/hadoop,WIgor/hadoop,taoguan/hadoop,sroegner/hadoop,ChetnaChaudhari/hadoop,adouang/hadoop,Winiex/hadoop,binn-yang/hadoop,samuelan/hadoop,MetSystem/hadoop,fullcontact/hadoop,OnePaaS/hadoop,wenxinhe/hadoop,Elbehery/hadoop,MobinRanjbar/hadoop,ucare-uchicago/hadoop,dennishuo/hadoop,xujianhai/hadoop,faspl/hadoop,allfro/hadoop,JingchengDu/hadoop,legend-hua/hadoop,OnePaaS/hadoop,cnfire/hadoop,lightslife/hadoop,soumabrata-chakraborty/hadoop,nandakumar131/hadoop,GeLiXin/hadoop,NightWolf007/hadoop,huafengw/hadoop,lukmajercak/hadoop,hash-X/hadoop,ronny-macmaster/hadoop,skinzer/hadoop,nandakumar131/hadoop,zengzhaozheng/hadoop,hash-X/hadoop,StephanieMak/hadoop,anjuncc/hadoop,faspl/hadoop,abhishekagarwal87/hadoop,dongjiaqiang/hadoop,soumabrata-chakraborty/hadoop,apurtell/hadoop,liutizhong/hadoop,bitmybytes/hadoop,saydulk/hadoop,adouang/hadoop,hjk41/hadoop,dierobotsdie/hadoop,dennishuo/hadoop,littlezhou/hadoop,MetSystem/hadoop,malli3131/hadoop-1,slchen2014/hadoop,taoguan/hadoop,eonezhang/hadoop,cryptickp/hadoop,gilv/hadoop,mapr/hadoop-common,weipinghe/hadoop,hash-X/hadoop,yanbit/hadoop,lzo/hadoop,LoQIStar/hadoop,likaiwalkman/hadoop,chetan-anand/hadoop,qqming113/hadoop,apurtell/hadoop,ctrezzo/hadoop,OnePaaS/hadoop,plusplusjiajia/hadoop,MetSystem/hadoop,xiao-chen/hadoop,cnfire/hadoop,samuelan/hadoop,pkdevbox/hadoop,allfro/hadoop,ouyangjie/hadoop,binn-yang/hadoop,dxd132630/hadoop,venkateshu/hadoop,pkdevbox/hadoop,hjk41/hadoop,f7753/hadoop,weipinghe/hadoop,sasa233/hadoop,bitmybytes/hadoop,grokcoder/hadoop,anjuncc/hadoop,flyrain/hadoop,slchen2014/hadoop,tianshouzhi/hadoop,steveloughran/hadoop,legend-hua/hadoop,lightslife/hadoop,xujianhai/hadoop,GeLiXin/hadoop,szegedim/hadoop,zengzhaozheng/hadoop,Authorlove/hadoop,frdeso/hadoop,dierobotsdie/hadoop,matrix-stone/hadoop,neo-hu/hadoop,1tylermitchell/hadoop,ouyangjie/hadoop,harshavmb/hadoop,Winiex/hadoop,lightslife/hadoop,lzo/hadoop,venkateshu/hadoop,odpi/hadoop,wwjiang007/hadoop,fullcontact/hadoop,dierobotsdie/hadoop,hastimal/hadoop,djalova/hadoop,faspl/hadoop,eonezhang/hadoop,dennishuo/hadoop,taoguan/hadoop,faspl/hadoop,hjk41/hadoop,Authorlove/hadoop,pritishppai/hadoop,vlajos/hadoop,OnePaaS/hadoop,LoQIStar/hadoop,samuelan/hadoop,IBYoung/hadoop,sasa233/hadoop,MetSystem/hadoop,Ethanlm/hadoop,tianshouzhi/hadoop,Authorlove/hadoop,chenliang613/hadoop,legend-hua/hadoop,qqming113/hadoop,samuelan/hadoop,nandakumar131/hadoop,huafengw/hadoop,NightWolf007/hadoop,mapr/hadoop-common,liutizhong/hadoop,ucare-uchicago/hadoop,wwjiang007/hadoop,jingjidejuren/hadoop,cnfire/hadoop,StephanieMak/hadoop,djalova/hadoop,lukmajercak/hadoop,cryptickp/hadoop,JingchengDu/hadoop,nandakumar131/hadoop,lightslife/hadoop,dhootha/hadoop,eonezhang/hadoop,lukmajercak/hadoop,matrix-stone/hadoop,dxd132630/hadoop,pkdevbox/hadoop,skinzer/hadoop,979969786/hadoop,plusplusjiajia/hadoop,szegedim/hadoop,MobinRanjbar/hadoop,sasa233/hadoop,littlezhou/hadoop,steveloughran/hadoop,dxd132630/hadoop,EasonYi/hadoop,matrix-stone/hadoop,chenliang613/hadoop,Ethanlm/hadoop,Ethanlm/hadoop,saydulk/hadoop,yanbit/hadoop,mapr/hadoop-common,qqming113/hadoop,anjuncc/hadoop,xiao-chen/hadoop,pkit/hadoop,rohanwaghere/hadoop,JingchengDu/hadoop,jingjidejuren/hadoop,pkit/hadoop,apurtell/hadoop,jingjidejuren/hadoop,zengzhaozheng/hadoop,likaiwalkman/hadoop,eonezhang/hadoop,saydulk/hadoop,odpi/hadoop,dongjiaqiang/hadoop,leftnoteasy/hadoop-1,harshavmb/hadoop,taoguan/hadoop,vlajos/hadoop,Authorlove/hadoop,skinzer/hadoop,adouang/hadoop,soumabrata-chakraborty/hadoop,flyrain/hadoop,khiraiwa/hadoop,EasonYi/hadoop,szegedim/hadoop,rohanwaghere/hadoop,saydulk/hadoop,dossett/hadoop,adouang/hadoop,qqming113/hadoop,sasa233/hadoop,wwjiang007/hadoop,EasonYi/hadoop,laxman-ch/hadoop,adouang/hadoop,taoguan/hadoop,liutizhong/hadoop,sasa233/hadoop,SwathiMystery/hadoop,lawrencewu/hadoop,neo-hu/hadoop,pritishppai/hadoop,liutizhong/hadoop,faspl/hadoop,Ethanlm/hadoop,sasa233/hadoop,malli3131/hadoop-1,samuelan/hadoop,leftnoteasy/hadoop-1,rohanwaghere/hadoop,hastimal/hadoop,pritishppai/hadoop,dhootha/hadoop,khiraiwa/hadoop,xiao-chen/hadoop,Elbehery/hadoop,979969786/hadoop,GeLiXin/hadoop,plusplusjiajia/hadoop,littlezhou/hadoop,StephanieMak/hadoop,dennishuo/hadoop,eonezhang/hadoop,plusplusjiajia/hadoop,ctrezzo/hadoop,EasonYi/hadoop,zengzhaozheng/hadoop,hastimal/hadoop,gilv/hadoop,chenliang613/hadoop,cnfire/hadoop,allfro/hadoop,liutizhong/hadoop,apurtell/hadoop,rohanwaghere/hadoop,xujianhai/hadoop,WIgor/hadoop,apache/hadoop,xiao-chen/hadoop,cryptickp/hadoop,legend-hua/hadoop,allfro/hadoop,szegedim/hadoop,MobinRanjbar/hadoop,cryptickp/hadoop,LoQIStar/hadoop,dxd132630/hadoop,frdeso/hadoop,sroegner/hadoop,bitmybytes/hadoop,huafengw/hadoop,laxman-ch/hadoop,lzo/hadoop,LoQIStar/hadoop,ucare-uchicago/hadoop,xujianhai/hadoop,sujeetv/hadoop,sroegner/hadoop,weipinghe/hadoop,vlajos/hadoop,odpi/hadoop,abhishekagarwal87/hadoop,dhootha/hadoop,leftnoteasy/hadoop-1,979969786/hadoop,sujeetv/hadoop,StephanieMak/hadoop,lawrencewu/hadoop,SwathiMystery/hadoop,khiraiwa/hadoop,dierobotsdie/hadoop,fullcontact/hadoop,chetan-anand/hadoop,GeLiXin/hadoop,jjj117/hadoop,slchen2014/hadoop,Winiex/hadoop,szegedim/hadoop,jingjidejuren/hadoop,ronny-macmaster/hadoop,Elbehery/hadoop,hastimal/hadoop,steveloughran/hadoop,NightWolf007/hadoop,Ethanlm/hadoop,piaoyu/hadoop,Ethanlm/hadoop,chetan-anand/hadoop,MetSystem/hadoop,IBYoung/hadoop,lawrencewu/hadoop,ading1977/hadoop,lawrencewu/hadoop,lukmajercak/hadoop,grokcoder/hadoop,dxd132630/hadoop,Elbehery/hadoop,ading1977/hadoop,saydulk/hadoop,harshavmb/hadoop,hjk41/hadoop,MobinRanjbar/hadoop,pkdevbox/hadoop,lukmajercak/hadoop,huafengw/hadoop,dierobotsdie/hadoop,ading1977/hadoop,xiao-chen/hadoop