HBASE-8944. Document workaround for MiniDFSCluster exceptions when running tests

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1503429 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8953 TestFromClientSide.testClientPoolThreadLocal fails; DEBUG

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1503444 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8943 TestRegionMergeTransactionOnCluster#testWholesomeMerge may fail due to race in opening region

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HBASE-8952 Missing error handling can cause RegionServer RPC thread to busy loop forever

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HBASE-8955 TestStochasticLoadBalancer timedout

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1503482 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8909. HBASE-6170 broke hbase.regionserver.lease.period config, we should support it for BC

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1503484 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8909. HBASE-6170 broke hbase.regionserver.lease.period config, we should support it for BC (add missing file)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1503488 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8838 [WINDOWS] FileLink assumptions are broken under NTFS

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HBASE-8956 A couple of small misspellings thoughout the codebase.

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1503502 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-311-trunk-gd