Bug 30649: Vendor EDI account passwords should be encrypted in the database

Bug 30649: Vendor EDI account passwords should be encrypted in the database

We are storing edi vendor acccount passwords in clear text in the
database. Now that Koha has the Koha::Encryption module, we should
use that to encrypt passwords for all existing and new EDI accounts.

Test Plan:
1) Apply this patch
2) Create one or more EDI vendor accounts
3) Run a report to view the account passwords, note they are in clear
   text
4) Run updatedatabase.pl
5) Re-run the report, account passwords should be encrypted now
6) Edit a vendor EDI account, note you can still view and update the
   password for an account

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 40b1b61cbf384a2ac101eb12119e3d28a3e45315)
Signed-off-by: Pedro Amorim <pedro.amorim@ptfs-europe.com>