JIRA Agile would allow you to do something similar, but it's limited to Epics -> Stories -> Issues -> Sub-tasks. Otherwise you could go by issue type and use issue links to create the hierarchy, but you'll probably need some add-ons like JJUPIN or Script Runner to make issue linking mandatory and to enforce the general structure of this hierarchy.
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Any other country that celebrates Midsummer holiday (this friday 22 June)?
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