Fixes for Mantis 0006802

http://opensimulator.org/mantis/view.php?id=6802

- Fixed fields case at InventoryStore.migrations and type field type at RegionStore.migrations
- Removed debug sql insert info at PGSQL/PGSQLEstateData.cs, fixed sql returns
- Corrected param type from UUID to string at PGSQLSimulationData.cs