Refactor QA code to use common expand_section method

app/views/projects/deploy_keys/_index.html.haml

 - expanded = Rails.env.test?
-%section.settings.no-animate{ class: ('expanded' if expanded) }
+%section.settings.repository-deploy-keys.no-animate{ class: ('expanded' if expanded) }
   .settings-header
     %h4
       Deploy Keys
-    %button.btn.js-settings-toggle.qa-expand-deploy-keys
+    %button.btn.js-settings-toggle
       = expanded ? 'Collapse' : 'Expand'
     %p
       Deploy keys allow read-only or read-write (if enabled) access to your repository. Deploy keys can be used for CI, staging or production servers. You can create a deploy key or add an existing one.

app/views/projects/protected_branches/shared/_index.html.haml

 - expanded = Rails.env.test?
 
-%section.settings.no-animate{ class: ('expanded' if expanded) }
+%section.settings.project-protected-branches.no-animate{ class: ('expanded' if expanded) }
   .settings-header
     %h4
       Protected Branches

app/views/projects/protected_tags/shared/_index.html.haml

 - expanded = Rails.env.test?
 
-%section.settings.no-animate{ class: ('expanded' if expanded) }
+%section.settings.project-protected-tags.no-animate{ class: ('expanded' if expanded) }
   .settings-header
     %h4
       Protected Tags

ee/app/views/projects/mirrors/_push.html.haml

 - expanded = Rails.env.test?
-%section.settings.no-animate{ class: ('expanded' if expanded) }
+%section.settings.project-remote-mirror-settings.no-animate{ class: ('expanded' if expanded) }
   .settings-header
     %h4
       Push to a remote repository

ee/app/views/projects/push_rules/_index.html.haml

 - return unless @project.feature_available?(:push_rules)
 
 - expanded = Rails.env.test?
-%section.settings.no-animate{ class: ('expanded' if expanded) }
+%section.settings.repository-push-rules.no-animate{ class: ('expanded' if expanded) }
   .settings-header
     %h4
       Push Rules

qa/qa/page/project/settings/common.rb

@@ -3,9 +3,9 @@ module QA
     module Project
       module Settings
         module Common
-          def expand(element_name)
-            page.within('#content-body') do
-              click_element(element_name)
+          def expand_section(selector)
+            page.within(selector) do
+              find_button('Expand').click
 
               yield
             end

qa/qa/page/project/settings/main.rb

@@ -3,10 +3,10 @@ module QA
     module Project
       module Settings
         class Main < Page::Base
+          include Common
+
           def expand_advanced_settings
-            within('section.advanced-settings') do
-              find_button('Expand').click
-            end
+            expand_section('section.advanced-settings')
           end
 
           def rename_to(path)

qa/qa/page/project/settings/repository.rb

@@ -6,11 +6,11 @@ module QA
           include Common
 
           view 'app/views/projects/deploy_keys/_index.html.haml' do
-            element :expand_deploy_keys
+            element :expand_deploy_keys, '%section.settings.repository-deploy-keys'
           end
 
           def expand_deploy_keys(&block)
-            expand(:expand_deploy_keys) do
+            expand_section('section.repository-deploy-keys') do
               DeployKeys.perform(&block)
             end
           end