Upsert Strategy Codes

These options are used with:

- SqlUtil::AbstractTable::getBulkUpsertClosure()
- SqlUtil::AbstractTable::getUpsertClosure()
- SqlUtil::AbstractTable::getUpsertClosureWithValidation()
- SqlUtil::AbstractTable::upsert()
- SqlUtil::AbstractTable::upsertCommit()
- SqlUtil::AbstractTable::upsertFromIterator()
- SqlUtil::AbstractTable::upsertFromIteratorCommit()
- SqlUtil::AbstractTable::upsertFromSelect()
- SqlUtil::AbstractTable::upsertFromSelectCommit()

to specify the upsert strategy when synchronizing table data