[QA] Move epic-related method to EE class

Signed-off-by: Rémy Coutable <remy@rymai.me>

ee/app/views/layouts/nav/ee/_epic_link.html.haml

@@ -4,7 +4,7 @@
 - epics_items = ['epics#show', 'epics#index', 'roadmap#show']
 
 = nav_link(path: epics_items) do
-  = link_to group_epics_path(group) do
+  = link_to group_epics_path(group), class: 'qa-group-epics-link' do
     .nav-icon-container
       = sprite_icon('epic')
     %span.nav-item-name

qa/qa/ee/factory/resource/epic.rb

@@ -12,9 +12,9 @@ module QA
           def fabricate!
             group.visit!
 
-            QA::Page::Project::Menu.act { click_epics }
+            QA::EE::Page::Group::Menu.perform { |menu| menu.go_to_group_epics }
 
-            Page::Group::Epic::Index.perform do |page|
+            QA::EE::Page::Group::Epic::Index.perform do |page|
               page.click_new_epic
               page.set_title(@title)
               page.create_new_epic

qa/qa/ee/page/group/menu.rb

@@ -15,14 +15,24 @@ module QA
             element :group_settings_item
           end
 
+          view 'ee/app/views/layouts/nav/ee/_epic_link.html.haml' do
+            element :group_epics_link
+          end
+
           def go_to_saml_sso_group_settings
             hover_settings do
               within_submenu do
-                click_element :group_saml_sso_link
+                click_element(:group_saml_sso_link)
               end
             end
           end
 
+          def go_to_group_epics
+            within_sidebar do
+              click_element(:group_epics_link)
+            end
+          end
+
           private
 
           def hover_settings

qa/qa/page/project/menu.rb

@@ -119,12 +119,6 @@ module QA
           end
         end
 
-        def click_epics
-          within_sidebar do
-            click_link('Epics')
-          end
-        end
-
         private
 
         def hover_issues