Extract EE specific files/lines for spec/factories

We have the following files containing EE specific code. We should move them to ee/

• spec/factories/appearances.rb (Maybe change it to GitLab Testing Edition)
• spec/factories/boards.rb
• spec/factories/forked_project_links.rb
• spec/factories/groups.rb
• spec/factories/import_state.rb
• spec/factories/merge_requests.rb
• spec/factories/namespaces.rb
• spec/factories/projects.rb
• spec/factories/protected_branches.rb
• spec/factories/protected_tags.rb
• spec/factories/services.rb
• spec/factories/users.rb