Update gcli: remove --field option from list command

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>
Update tool.py: remove info command

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>
Update tool.py & listCommand.py: print possible field choices

Signed-off-by: Michael LeCompte <michaelslec98@gmail.com>