Bug 20509: Search for not defined authority codes

Bug 20509: Search for not defined authority codes

This patch adds a new check in
misc/maintenance/search_for_data_inconsistencies.pl to search for not
defined authority codes.

Test plan:
Set some auth_header.authtypecode to not defined authority codes in Koha
(UPDATE auth_header SET authtypecode="XXX" WHERE authid=42;)
Then run `misc/maintenance/search_for_data_inconsistencies.pl`

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>