fix for BUGZ-3804 - a wrong function call prevented correct ldif rendering of NG schema
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This merge request is automatically copied from !683 (merged) orginally made by @floridop
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## fix for BUGZ-3804 - a wrong function call prevented correct ldif rendering of NG schema
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Description
an additional call to self screwed up the dn structure
Leftovers from another patch caused queue dns to be rendered incorrectly. See 7666d087 (comment 9200)