Merge remote-tracking branch...

Merge remote-tracking branch 'origin/173-allow-mandatory-flag-in-questioncollections-for-multiple-choice-questioncollections' into 173-allow-mandatory-flag-in-questioncollections-for-multiple-choice-questioncollections
4 jobs for !148 with 173-allow-mandatory-flag-in-questioncollections-for-multiple-choice-questioncollections in 1 minute and 33 seconds (queued for 8 seconds)
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