Fix tests and rubocop offense

spec/features/variables_spec.rb

@@ -136,10 +136,10 @@ describe 'Project variables', js: true do
     end
 
     expect(page).to have_content('Update variable')
-    check('Protected')
+    uncheck('Protected')
     click_button('Save variable')
 
     expect(page).to have_content('Variable was successfully updated.')
-    expect(project.variables.first).not_to be_protected
+    expect(project.reload.variables.first).not_to be_protected
   end
 end

spec/lib/gitlab/utils_spec.rb

+require 'spec_helper'
+
 describe Gitlab::Utils, lib: true do
-  delegate :to_boolean, to: :described_class
+  delegate :to_boolean, :boolean_to_yes_no, to: :described_class
 
   describe '.to_boolean' do
     it 'accepts booleans' do
@@ -29,7 +31,9 @@ describe Gitlab::Utils, lib: true do
       expect(to_boolean('')).to be_nil
       expect(to_boolean(nil)).to be_nil
     end
+  end
 
+  describe '.boolean_to_yes_no' do
     it 'converts booleans to Yes or No' do
       expect(boolean_to_yes_no(true)).to eq('Yes')
       expect(boolean_to_yes_no(false)).to eq('No')