Draft: Test offline scripts in Java Maven

What does this MR do?

Exercises the changes in Switch offline script over to CI Templates (gitlab-org/security-products/tests/java-maven!201 - merged) • Philip Cunningham • 16.8

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Job definition updated, if necessary
  • Auto-DevOps template
  • Job definition example
  • CI Templates
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer