Set 'request_access_enabled' false by default

   Set request access for projects/groups to false by default.
   Request access implemented in !5286 8.10 was enabled by default.

db/migrate/20161020075734_default_request_access_groups.rb

+class DefaultRequestAccessGroups < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+  DOWNTIME = false
+
+  def up
+    change_column_default :namespaces, :request_access_enabled, false
+  end
+
+  def down
+    change_column_default :namespaces, :request_access_enabled, true
+  end
+end

db/migrate/20161020075830_default_request_access_projects.rb

+class DefaultRequestAccessProjects < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+  DOWNTIME = false
+  
+  def up
+    change_column_default :projects, :request_access_enabled, false
+  end
+
+  def down
+    change_column_default :projects, :request_access_enabled, true
+  end
+end

db/schema.rb

@@ -720,7 +720,7 @@ ActiveRecord::Schema.define(version: 20161106185620) do
     t.string "avatar"
     t.boolean "share_with_group_lock", default: false
     t.integer "visibility_level", default: 20, null: false
-    t.boolean "request_access_enabled", default: true, null: false
+    t.boolean "request_access_enabled", default: false, null: false
     t.datetime "deleted_at"
     t.boolean "lfs_enabled"
     t.text "description_html"
@@ -908,7 +908,7 @@ ActiveRecord::Schema.define(version: 20161106185620) do
     t.boolean "only_allow_merge_if_build_succeeds", default: false, null: false
     t.boolean "has_external_issue_tracker"
     t.string "repository_storage", default: "default", null: false
-    t.boolean "request_access_enabled", default: true, null: false
+    t.boolean "request_access_enabled", default: false, null: false
     t.boolean "has_external_wiki"
     t.boolean "lfs_enabled"
     t.text "description_html"