HBASE-9510 Namespace operations should throw clean exceptions

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1523907 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9555 Reset loadbalancer back to StochasticLoadBalancer

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1523915 13f79535-47bb-0310-9956-ffa450edef68
Update doc in 0.96 branch

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Update issues fixed for 0.96.0 second RC

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HBASE-9555 Reset loadbalancer back to StochasticLoadBalancer; ADDENDUM

git-svn-id: https://svn.apache.org/repos/asf/hbase/branches/0.96@1523927 13f79535-47bb-0310-9956-ffa450edef68
Small fix for build tool

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