Add projects endpoint to IssuablesHelper

ee/app/helpers/ee/issuables_helper.rb

@@ -22,6 +22,7 @@ module EE
         data[:issueLinksEndpoint] = group_epic_issues_path(parent, issuable)
         data[:epicLinksEndpoint] = group_epic_links_path(parent, issuable)
         data[:fullPath] = parent.full_path
+        data[:projectsEndpoint] = expose_path(api_v4_groups_projects_path(id: parent.id))
       end
 
       data

ee/spec/helpers/ee/issuables_helper_spec.rb

@@ -35,7 +35,8 @@ describe IssuablesHelper do
         initialTitleText: epic.title,
         initialDescriptionHtml: '<p dir="auto">epic text</p>',
         initialDescriptionText: 'epic text',
-        initialTaskStatus: '0 of 0 tasks completed'
+        initialTaskStatus: '0 of 0 tasks completed',
+        projectsEndpoint: "/api/v4/groups/#{@group.id}/projects"
       }
       expect(helper.issuable_initial_data(epic)).to eq(expected_data)
     end