HBASE-7938 Add integration test for ImportTsv/LoadIncrementalHFiles workflow (Nick Dimiduk)

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1456700 13f79535-47bb-0310-9956-ffa450edef68
HBASE-8034 record on-disk data size for store file and make it available during writing

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1456743 13f79535-47bb-0310-9956-ffa450edef68