orphaned session records not cleaned (#329)

[markusraulf]

Proposed change

• Do not throw an error in RemoveSessionByUser() if orphaned session is found.
• Add console commands to list and remove orphaned sessions.
• Wrote test creating and removing orphaned session.

Type of change

• '1 - 🐞 bug 🐞' - Bugfix (non-breaking change which fixes an issue)

  • This PR is related to PR: #329

  Checklist

  • [x ] The code change is tested and works locally.(❗)
  • [x ] There is no commented out code in this PR.(❕)
  • [x ] You improved or added new unit tests.(❕)
  • [x ] Local ZnunyCodePolicy passed.(❕)
  • [ ] Local UnitTests / Selenium passed.(❕)
  • [ ] GitHub workflow CI (UnitTests / Selenium) passed.(❗)

[NiklasSchmitt]

Hi @markusraulf,

thank you very much for your contribution to Znuny. I've checked your code and just updated some minor stuff here and there. I would approve and merge it after we reviewed & tested it internally.

Best, Niklas

[NiklasSchmitt]

This merge-request will be part of the upcoming Znuny version 7.0.9