Decrease Perceived and Cyclomatic Complexity

What does this MR do?

• refactor app/helpers/license_helper.rb:15:3
• refactor app/helpers/tree_helper.rb:111:3

Are there points in the code the reviewer needs to double check?

Why was this MR needed?

It allows to merge these MRs:

• https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/14152
• https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/14160

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

• https://gitlab.com/gitlab-org/gitlab-ce/issues/31362
• https://gitlab.com/gitlab-org/gitlab-ce/issues/31358

/cc @rymai @markglenfletcher @grzesiek @blackst0ne @rspeicher

Possible labels: Community Contribution backstage Edge static analysis