Remove usages of Commons Lang 2

[jonesbusy]

Remove usages of Commons Lang 2

Testing done

mvn clean install

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

[alecharp]

If we could have a release of this plugin including this pull request, it would help jenkinsci/bom#6234. Thanks.

[alecharp]

thank you @jonesbusy !