Bug 22047: Add 'skip_validation' param to Koha::Patron->set_password

Bug 22047: Add 'skip_validation' param to Koha::Patron->set_password

This patch makes Koha::Patron->set_password expect a hashref as param
and adds support for an 'skip_validation' param to be passed. Its purpose is to
make the method skip the relevant password strength checks if required.

It targets the Auth_with_ldap.pm usage when the 'update_password' flag
is set in the configuration.

The tests on this bug cover this use case so, to test:

- Apply the tests patch
- Run:
  $ kshell
 k$ prove t/db_dependent/Koha/Patrons.t
=> FAIL: Tests fail, code doesn't work as expected
- Apply this patch
- Run:
 k$ prove t/db_dependent/Koha/Patrons.t
=> SUCCESS: Tests pass! Yay!
- Sign off :-D

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>