Bulk Load fixes

- fix for bug 1383849 . Releasing the bulk load objects once load is done.
- bulk load now uses CIF by default. This does not apply to populating
  indexes using bulk load.
- fix for hive/test015 so it does not fail on the test machines

Change-Id: Iaafe8de8eb60352b0d4c644e9da0d84a4068688c
Merge "Bulk Load fixes"