Whitelist additional safe Groovy XML helpers (GPathResult traversal, …

[bernardladenthin]

Whitelist additional safe Groovy XML helpers (GPathResult traversal, attributes, namespaces) and extend java.time utilities with harmless creation and conversion methods

Testing done

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests that demonstrate the feature works or the issue is fixed

[bernardladenthin]

Hi folks, I hope you can review and include some of these proposed whitelist additions from my local changes, as they may be useful for others as well. Thanks, Bernard

[bernardladenthin]

I'll check soon: Whitelist is out of order! Please see issues above.