Parent node is always null after restarting Openfire server

[Michael_Grafl]

Thanks for filing the issue.
Some more clarification:

• We are experiencing the problem with Openfire version 4.6.6.
• The bugfix for Bug in PEP Service, updates to nodes are not pushed to roster contacts (referenced by @totzkotz) for version 4.7.0 only partially fixes the problem: getParent() now returns any existing parent (even if parentIdentifier is not set). We have not yet verified whether this resolves the problem in our particular scenario.
• Nevertheless, the changes for [OF-2401] - Ignite Realtime Jira will ensure, that both values remain consistent. However, I noticed that https://github.com/igniterealtime/Openfire/pull/2008 only changes the parentIdentifier if the newParent is not null. Should the parentIdentifier also be adjusted if newParent is null?