message: fix cube example fail bug
diff: @@ -304,7 +304,7 @@ class Server(object):
  fout.write(str(list(self.model_conf.values())[idx]))
  for workflow in self.workflow_conf.workflows:
  for node in workflow.nodes:
  - if "dist_kv" in node.name:
  + if "distkv" in node.name.lower():
  self.resource_conf.cube_config_path = workdir
  self.resource_conf.cube_config_file = self.cube_config_fn
  if cube_conf == None:
  @@ -312,7 +312,7 @@ class Server(object):
  "Please set the path of cube.conf while use dist_kv op."
  )
  shutil.copy(cube_conf, workdir)
  - if "quant" in node.name:
  + if "quant" in node.name.lower():
  self.resource_conf.cube_quant_bits = 8
  self.resource_conf.model_toolkit_path.extend([workdir])
  self.resource_conf.model_toolkit_file.extend(
  