YARN-2635. Merging to branch-2.6 for hadoop-2.6.0-rc1.
YARN-2635. Merging to branch-2.6 for hadoop-2.6.0-rc1.

(cherry picked from commit 81dc0ac6dcf2f34ad607da815ea0144f178691a9)

Microsoft-CISL/hadoop-prototype,mix/hadoop,mix/hadoop,zjshen/hadoop-in-docker,zrccxyb62/hadoop,zjshen/hadoop-in-docker,hasonhai/hadoop,satishpatil2k13/ODPI-Hadoop,hasonhai/hadoop,satishpatil2k13/ODPI-Hadoop,Microsoft-CISL/hadoop-prototype,zrccxyb62/hadoop,Microsoft-CISL/hadoop-prototype,myeoje/PhillyYarn,Microsoft-CISL/hadoop-prototype,jokes000/hadoop,intel-hadoop/hadoop,an3m0na/hadoop,myeoje/PhillyYarn,zrccxyb62/hadoop,mix/hadoop,zjshen/hadoop-in-docker,intel-hadoop/hadoop,huiyi-learning/hadoop,jokes000/hadoop,huiyi-learning/hadoop,myeoje/PhillyYarn,an3m0na/hadoop,mix/hadoop,zjshen/hadoop-in-docker,an3m0na/hadoop,zrccxyb62/hadoop,jokes000/hadoop,zjshen/hadoop-in-docker,MjAbuz/hadoop,Microsoft-CISL/hadoop-prototype,Microsoft-CISL/hadoop-prototype,jokes000/hadoop,MjAbuz/hadoop,intel-hadoop/hadoop,an3m0na/hadoop,an3m0na/hadoop,hasonhai/hadoop,MjAbuz/hadoop,satishpatil2k13/ODPI-Hadoop,huiyi-learning/hadoop,myeoje/PhillyYarn,mix/hadoop,Microsoft-CISL/hadoop-prototype,hasonhai/hadoop,jokes000/hadoop,myeoje/PhillyYarn,intel-hadoop/hadoop,hasonhai/hadoop,myeoje/PhillyYarn,jokes000/hadoop,MjAbuz/hadoop,hasonhai/hadoop,huiyi-learning/hadoop,zrccxyb62/hadoop,jokes000/hadoop,satishpatil2k13/ODPI-Hadoop,hasonhai/hadoop,satishpatil2k13/ODPI-Hadoop,an3m0na/hadoop,mix/hadoop,an3m0na/hadoop,mix/hadoop,zrccxyb62/hadoop,myeoje/PhillyYarn,Microsoft-CISL/hadoop-prototype,huiyi-learning/hadoop,hasonhai/hadoop,intel-hadoop/hadoop,zjshen/hadoop-in-docker,huiyi-learning/hadoop,satishpatil2k13/ODPI-Hadoop,MjAbuz/hadoop,satishpatil2k13/ODPI-Hadoop,zjshen/hadoop-in-docker,MjAbuz/hadoop,MjAbuz/hadoop,zrccxyb62/hadoop,intel-hadoop/hadoop,intel-hadoop/hadoop,satishpatil2k13/ODPI-Hadoop,an3m0na/hadoop,mix/hadoop,zjshen/hadoop-in-docker,jokes000/hadoop,myeoje/PhillyYarn,huiyi-learning/hadoop,huiyi-learning/hadoop