Bug 24235: DUEDGST not sent if PREDUDGST checkbox is off

Bug 24235: DUEDGST not sent if PREDUDGST checkbox is off

DUEDGST notice required PREDUEDGST to be on, but both messages have to
be generated independently

Test plan:
0) Do not apply the patch and reproduce the bug
    - turn OFF sms PREDUEDGST and turn ON sms DUEDGST for a given borrower
    - Sms version of DUEDGST is never generated into the message queue.
1) Apply the patch
2) Ensure that the bug is fixed

Signed-off-by: Michal Denar <black23@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>