occtl: Fix column misalignment in ban command outputs

- Increase the width from 14 to 15 characters for 'show bans' and
'show ban points' commands. This ensures proper column alignment
for all valid IPv4 addresses.

- Reduce Score column to 10 characters since UINT_MAX is typically
10 digits.

- Remove unnecessary (unsinged int) cast since 'score' is an actual
unsigned int.

Signed-off-by: Grigory Trenin <grigory.trenin@gmail.com>