Merge branch 'rc/synchronous_reactive_cache' into 'master'

Add ability to run reactive caching synchronously

See merge request gitlab-org/gitlab!20655

app/models/concerns/reactive_caching.rb

@@ -122,6 +122,14 @@ module ReactiveCaching
       end
     end
 
+    # This method is used for debugging purposes and should not be used otherwise.
+    def without_reactive_cache(*args, &blk)
+      return with_reactive_cache(*args, &blk) unless Rails.env.development?
+
+      data = self.class.reactive_cache_worker_finder.call(id, *args).calculate_reactive_cache(*args)
+      yield data
+    end
+
     def clear_reactive_cache!(*args)
       Rails.cache.delete(full_reactive_cache_key(*args))
       Rails.cache.delete(alive_reactive_cache_key(*args))