Bug 17459: Follow up

Bug 17459: Follow up

Adding POD and --userid and --password options

1/ To test, use the same routine as before, with no options.
2/ You should have a user with koha/koha as userid and passwords
3/ Delete that user
4/ Run the script with --userid <userid> --password <password>
5/ You should have a user in koha with userid/password set

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit f9da6f9739b334a1e14b75a1aa49b2f5569b032e)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>