YARN-2853. Merging to branch-2.6 for hadoop-2.6.0-rc1.
YARN-2853. Merging to branch-2.6 for hadoop-2.6.0-rc1.

(cherry picked from commit d648e60ebab7f1942dba92e9cd2cb62b8d70419b)

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