Fix RSpec/LeakyConstantDeclaration cop violations
requested to merge gitlab-community/gitlab:211580-leaky-constant-declaration-spec-mailers into master
What does this MR do and why?
Fix rubocop offenses
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
-
I have evaluated the MR acceptance checklist for this MR.
Related to #211580