Add tests for the 'batch upsert' -mapunknown, -nocomplain, and -ifnotexists options.
Add tests for the 'batch upsert' -mapunknown, -nocomplain, and -ifnotexists options.

gahr/casstcl,flightaware/casstcl,flightaware/casstcl,gahr/casstcl,flightaware/casstcl