Update Java dependencies: Selenium, GitLab API, Netty, parent POM

[zbynek]

Bundles several dependency updates into one PR and resolves compatibility issues.
#1472
#1465
#1471
#1411
#1483

Testing done

CI passed

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1. Make sure you are opening from a **topic/feature/bugfix branch** (right side) and not your main branch!

   Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
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2. Ensure that the pull request title represents the desired changelog entry

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3. Please describe what you did

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4. Link to relevant issues in GitHub or Jira

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5. Link to relevant pull requests, esp. upstream and downstream changes

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6. Ensure you have provided tests - that demonstrates feature works or fixes the issue

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[zbynek]

@NotMyFault thanks for restarting the CI, looks good now.

[NotMyFault]

@NotMyFault thanks for restarting the CI, looks good now.

I have to thank you for combining the PRs :)