YARN-2700 TestSecureRMRegistryOperations failing on windows: auth problems
HDFS-7254. Add documentation for hot swaping DataNode drives (Lei Xu via Colin P. McCabe)
(cherry picked from commit 66e8187ea1dbc6230ab2c633e4f609a7068b75db)
HDFS-6877. Avoid calling checkDisk when an HDFS volume is removed during a write. (Lei Xu via Colin P. McCabe)
(cherry picked from commit 7b0f9bb2583cd9b7274f1e31c173c1c6a7ce467b)