HBASE-9213 Fix release warning

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1514140 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9191 Update Loadbalancer method to throw HBaseIOException

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1514155 13f79535-47bb-0310-9956-ffa450edef68