HBASE-11947 NoSuchElementException in balancer for master regions (Sergey Soldatov and Jimmy Xiang)
HBASE-11936 IsolationLevel must be attribute of a Query not a Scan (Vladimir Rodionov)
HBASE-11604 Disable co-locating meta/master by default
HBASE-11845 HFile tool should implement Tool, disable blockcache by default

HFileTool now accepts configuration via -D arguments. The blockcache is
disabled by default.
HBASE-11845 addendum