PRD-4365: Upgraded POI from 3.8 to 3.9
PRD-4365: Upgrade POI from 3.6 to 3.9
Fixed typo for POI
Merge pull request #15 from pentaho-skarmali/PRD-4365_poi_upgrade_from_3.8_to_3.9

PRD-4365: Upgraded POI from 3.8 to 3.9