Add more cobra information to grandfibermap

The original comment in INSTRM-1138 claims that the mod column is confusing since it is from fiber ferrule ID, not from the board ID. There is no column describing module id itself. So the following update (copy from INSTRM-1124) is needed:

• could you add a "module" columns which would be 1-42 module number. ($fld-1)*42 + $mf, I think.
• could you add a "board number" column (1A, 1B, ... 42A, 42B), where the board is A if $cm is odd, B if $cm is even. Or I guess just A/B, and we could use the "module" column for the module.