HBASE-8726 Create an Integration Test for online schema change

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1512429 13f79535-47bb-0310-9956-ffa450edef68
HBASE-9097: Set HBASE_CLASSPATH before rest of the classpath

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1512460 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd