Make fabrication of default config entry more readable

lib/gitlab/ci/config/entry/job.rb

@@ -150,7 +150,7 @@ module Gitlab
               stage: stage_value,
               cache: cache_value,
               only: only_value,
-              except: except_value.to_h,
+              except: except_value,
               variables: variables_defined? ? variables_value : nil,
               environment: environment_defined? ? environment_value : nil,
               environment_name: environment_defined? ? environment_value[:name] : nil,

lib/gitlab/config/entry/factory.rb

@@ -53,10 +53,12 @@ module Gitlab
           # If entry has a default value we fabricate concrete node
           # with default value.
           #
-          if @entry.default(@attributes).nil?
-            fabricate(Entry::Undefined)
-          else
-            fabricate(@entry, @entry.default(@attributes))
+          @entry.default(@attributes).yield_self do |default|
+            if default.nil?
+              fabricate(Entry::Undefined)
+            else
+              fabricate(@entry, default)
+            end
           end
         end