Update how to build 'hbase.apache.org' site -- REDO

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1465462 13f79535-47bb-0310-9956-ffa450edef68
Fix path to hbase-default.xml after copying over manual

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1465480 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8287 TestRegionMergeTransactionOnCluster failed in trunk build #4010

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1465528 13f79535-47bb-0310-9956-ffa450edef68