Card #266 fix for importer generated enums for result heading from xsd was using name (HCO_3) rather than correct value (hco3) affects all result headings with numbers as xsd -> java generator creates enum names dynamically (note: will still allow import of observations with code not in result headings),
fix for importer date check < instead of <= (was missing dates with no timestamp),
added boolean to MigrationUser to specify if existing test observation data should be removed as part of migration
Card #266 MigrationUser default false on delete existing observation data