Bug 29620: (follow-up) Rename remaining old-style parameters

Bug 29620: (follow-up) Rename remaining old-style parameters

The first routes we added named parameters in camelCase. We moved to
snake_case really fast, but there are two that were kept by mistake.

This patch fixes them.

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>