autoscaling.yaml can not work correctly

[wenbin luo]

When use autoscaling.yaml template to create a stack, the stack created failed.
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/osc_lib/shell.py", line 135, in run
    ret_val = super(OpenStackShell, self).run(argv)
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 267, in run
    result = self.run_subcommand(remainder)
  File "/usr/lib/python2.7/site-packages/osc_lib/shell.py", line 180, in run_subcommand
    ret_value = super(OpenStackShell, self).run_subcommand(argv)
  File "/usr/lib/python2.7/site-packages/cliff/app.py", line 387, in run_subcommand
    result = cmd.run(parsed_args)
  File "/usr/lib/python2.7/site-packages/osc_lib/command/command.py", line 41, in run
    return super(Command, self).run(parsed_args)
  File "/usr/lib/python2.7/site-packages/cliff/display.py", line 100, in run
    column_names, data = self.take_action(parsed_args)
  File "/usr/lib/python2.7/site-packages/heatclient/osc/v1/stack.py", line 179, in take_action
    stack = client.stacks.create(**fields)['stack']
  File "/usr/lib/python2.7/site-packages/heatclient/v1/stacks.py", line 172, in create
    data=kwargs, headers=headers)
  File "/usr/lib/python2.7/site-packages/keystoneauth1/adapter.py", line 193, in post
    return self.request(url, 'POST', **kwargs)
  File "/usr/lib/python2.7/site-packages/heatclient/common/http.py", line 318, in request
    raise exc.from_response(resp)
HTTPBadRequest: ERROR: Property error: : resources.cpu_alarm_low.properties.query: : Items to join must be strings not {u'=': {u'server_group': u'None'}}
The heat version is 7.0.3