Fix dump config function to move into server module

lib/fluent/supervisor.rb

@@ -140,6 +140,14 @@ def kill_worker
         end
       end
     end
+
+    def supervisor_dump_config_handler
+      $log.info config[:fluentd_conf].to_s
+    end
+
+    def supervisor_get_dump_config_handler
+      {conf: config[:fluentd_conf].to_s}
+    end
   end
 
   module WorkerModule
@@ -221,7 +229,7 @@ def self.load_config(path, params = {})
                                    WorkerModule.name,
                                    path,
                                    JSON.dump(params)],
-          fluentd: fluentd_conf,
+          fluentd_conf: fluentd_conf,
           main_cmd: main_cmd,
       }
       pre_params = params.dup
@@ -511,14 +519,6 @@ def main_process(&block)
       exit! 1
     end
 
-    def supervisor_dump_config_handler
-      $log.info @conf.to_s
-    end
-
-    def supervisor_get_dump_config_handler
-      {conf: @conf.to_s}
-    end
-
     def read_config
       $log.info "reading config file", path: @config_path
       @config_fname = File.basename(@config_path)