Prevent ApplicationSetting to cache nil value
What does this MR do?
Tries to fix ApplicationSetting violation described in https://gitlab.com/gitlab-org/gitlab-ce/issues/39275
Does this MR meet the acceptance criteria?
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Changelog entry added, if necessary -
Tests added for this feature/bug - Review
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Has been reviewed by Backend
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Conform by the merge request performance guides -
Conform by the style guides -
Squashed related commits together