Bug 11760: In notices, output road type description rather than code

Test plan :
  - Define a notice containing <<borrowers.streettype>>
  - Trigger an event that generate this notice

Without patch <<borrowers.streettype>> is replaced by ROADTYPE
authorised value code. With the patch it is resplaced by its
description

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
This works as described, passes tests and QA script.

Note: it seems it's not possible currently to use B_streettype from
the interface, but it might be worth adding it as a follow up for later
use.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit b5d85741a7d297c70783a649ac00f26c82351a6f)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>