<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def __metadata_helper(json_path):
 """ Returns json for specific cluster metadata. Important to realize that this was introduced in dcos-1.9. Clusters prior to 1.9 and missing metadata will return None """

    url = shakedown.dcos_url_path('dcos-metadata/{}'.format(json_path))
    try:
        response = dcos.http.request('get', url)

        if response.status_code == 200:
            return response.json()
    except:
        pass

    return None