Ensure Projects::ApproversController inherits from Projects::ApplicationController

Fix gitlab-org/gitlab-ce#14503.

!! This will need to be ported to master once CE master is merged into EE master !!

Enabled an automatic merge when the build for 98905642 succeeds

@DouweM Specs are fixed by !295 (merged). Merging!

Canceled the automatic merge

Status changed to merged

mentioned in commit 587fb0ad

Picked into 8-6-stable-ee, will go into 8.6.1.

Removed ~149424 label

mentioned in merge request !303 (merged)

mentioned in commit fc8b0748

Mentioned in commit pfjason/gitlab-ce@fc8b0748