Add default_enabled param

Use default from YML config file for epic_boards feature flag.

ee/app/controllers/groups/epic_boards_controller.rb

@@ -70,6 +70,6 @@ class Groups::EpicBoardsController < Groups::ApplicationController
   end
 
   def authorize_read_board!
-    access_denied! unless Feature.enabled?(:epic_boards, group) && can?(current_user, :read_epic_board, group)
+    access_denied! unless Feature.enabled?(:epic_boards, group, default_enabled: :yaml) && can?(current_user, :read_epic_board, group)
   end
 end

ee/app/graphql/mutations/boards/epic_boards/epic_move_list.rb

@@ -50,7 +50,7 @@ module Mutations
           board = authorized_find!(id: args[:board_id])
           epic = authorized_find!(id: args[:epic_id])
 
-          unless Feature.enabled?(:epic_boards, board.resource_parent)
+          unless Feature.enabled?(:epic_boards, board.resource_parent, default_enabled: :yaml)
             raise Gitlab::Graphql::Errors::ResourceNotAvailable, 'epic_boards feature is disabled'
           end
 

ee/app/graphql/mutations/boards/epic_boards/update.rb

@@ -24,7 +24,7 @@ module Mutations
         def resolve(**args)
           board = authorized_find!(id: args[:id])
 
-          unless Feature.enabled?(:epic_boards, board.resource_parent)
+          unless Feature.enabled?(:epic_boards, board.resource_parent, default_enabled: :yaml)
             raise Gitlab::Graphql::Errors::ResourceNotAvailable, 'epic_boards feature is disabled'
           end
 

ee/app/graphql/resolvers/boards/epic_boards_resolver.rb

@@ -16,7 +16,7 @@ module Resolvers
       alias_method :group, :object
 
       def resolve(id: nil)
-        return unless Feature.enabled?(:epic_boards, group)
+        return unless Feature.enabled?(:epic_boards, group, default_enabled: :yaml)
         return unless group.licensed_feature_available?(:epics)
 
         authorize!

ee/app/services/boards/epic_boards/create_service.rb

@@ -8,7 +8,7 @@ module Boards
 
       override :can_create_board?
       def can_create_board?
-        Feature.enabled?(:epic_boards, parent)
+        Feature.enabled?(:epic_boards, parent, default_enabled: :yaml)
       end
 
       override :parent_board_collection

ee/app/services/boards/epic_lists/create_service.rb

@@ -7,7 +7,7 @@ module Boards
 
       override :execute
       def execute(board)
-        unless Feature.enabled?(:epic_boards, board.group)
+        unless Feature.enabled?(:epic_boards, board.group, default_enabled: :yaml)
           return ServiceResponse.error(message: 'Epic boards feature is not enabled.')
         end
 

ee/app/services/boards/epic_lists/destroy_service.rb

@@ -11,7 +11,7 @@ module Boards
           return ServiceResponse.error(message: 'Epics feature is not available.')
         end
 
-        unless Feature.enabled?(:epic_boards, list.board.group)
+        unless Feature.enabled?(:epic_boards, list.board.group, default_enabled: :yaml)
           return ServiceResponse.error(message: 'Epic boards feature is not enabled.')
         end
 

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

@@ -20,7 +20,7 @@
       = link_to group_epics_path(group), title: 'List' do
         %span= _('List')
 
-    - if Feature.enabled?(:epic_boards, group)
+    - if Feature.enabled?(:epic_boards, group, default_enabled: :yaml)
       = nav_link(path: ['epic_boards#index', 'epic_boards#show'], html_options: { class: "home" }) do
         = link_to group_epic_boards_path(group), title: 'Boards' do
           %span= _('Boards')