Fix warning already initialized constant LABEL_TITLES

spec/features/projects/labels/user_views_labels_spec.rb:7: warning: already initialized constant LABEL_TITLES
spec/features/issues/user_creates_issue_spec.rb:67: warning: previous definition of LABEL_TITLES was here

spec/features/issues/user_creates_issue_spec.rb

+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe "User creates issue" do
@@ -64,10 +66,10 @@ describe "User creates issue" do
     end
 
     context "with labels" do
-      LABEL_TITLES = %w(bug feature enhancement).freeze
+      let(:label_titles) { %w(bug feature enhancement) }
 
       before do
-        LABEL_TITLES.each do |title|
+        label_titles.each do |title|
           create(:label, project: project, title: title)
         end
       end
@@ -77,13 +79,13 @@ describe "User creates issue" do
 
         fill_in("Title", with: issue_title)
         click_button("Label")
-        click_link(LABEL_TITLES.first)
+        click_link(label_titles.first)
         click_button("Submit issue")
 
         expect(page).to have_content(issue_title)
           .and have_content(user.name)
           .and have_content(project.name)
-          .and have_content(LABEL_TITLES.first)
+          .and have_content(label_titles.first)
       end
     end
   end

spec/features/projects/labels/user_views_labels_spec.rb

+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe "User views labels" do
   set(:project) { create(:project_empty_repo, :public) }
   set(:user) { create(:user) }
 
-  LABEL_TITLES = %w[bug enhancement feature].freeze
+  let(:label_titles) { %w[bug enhancement feature] }
 
   before do
-    LABEL_TITLES.each { |title| create(:label, project: project, title: title) }
+    label_titles.each { |title| create(:label, project: project, title: title) }
 
     project.add_guest(user)
     sign_in(user)
@@ -17,7 +19,7 @@ describe "User views labels" do
 
   it "shows all labels" do
     page.within('.other-labels .manage-labels-list') do
-      LABEL_TITLES.each { |title| expect(page).to have_content(title) }
+      label_titles.each { |title| expect(page).to have_content(title) }
     end
   end
 end