Fix priority not handled in AggregateHydrator
Merge branch 'hotfix/4523'

Close #4523
Merge branch 'hotfix/4526'

Close #4526
Merge pull request #4528 from bakura10/fix-aggregate-hydrator

Fix priority not handled in AggregateHydrator
Merge branch 'hotfix/4528' into develop

Forward port #4528