HBASE-7944 Addendum (Jeffrey Zhong)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1453059 13f79535-47bb-0310-9956-ffa450edef68
HBASE-7994 Disable unit tests under hbase-examples; they fail too often up on jenkins; APPLIED BOTH ORIGINAL PATCH AND ADDENDUM IN ONE GO

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1453091 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8007 Adopt TestLoadAndVerify from BigTop

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1453101 13f79535-47bb-0310-9956-ffa450edef68