MAI: mention `omega` as default solver in "`jtlv` not found" message
MAI: mention `omega` as default solver in "`jtlv` not found" message

revises:
    10033772549067960fbd021008393b4d4d90dd1b

tulip-control/tulip-control,tulip-control/tulip-control,tulip-control/tulip-control,tulip-control/tulip-control