Increase test coverage for spotbugs

What does this MR do?

In this MR, we added more unit tests to increase the test coverage for analyze.go in spotbugs.

What are the relevant issue numbers?

Issue

Result

Before

➜  spotbugs git:(master) go test -cover analyze.go analyze_test.go
PASS | command-line-arguments 0.101s
COVER| 12.4% [#_________]

After

➜  spotbugs git:(add_test) go test -cover analyze.go analyze_test.go
PASS | command-line-arguments 0.157s
COVER| 20.7% [##________]

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 (also in CE)
  • Job definition example
  • CI Templates (to be removed)
  • Vendored CI Templates (also in CE)
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer