Merge branch 'fix-avs-etl-add-labels' into 'master'

Fix etl changed labels when object labels is None.

See merge request !6849

(cherry picked from commit 9966bbab)

eb5f037d Fix etl changed labels when object labels is None.
5141dcfc Add label_enable_setting to managedobject.
6 jobs for !6876 with cherry-pick-9966bbab in 27 minutes and 15 seconds (queued for 5 seconds)
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