'Given a parameter dict of
\'Instances.SlaveInstanceType\': [\'m1.small\'],
\'Instances.InstanceCount\': [\'1\']
returns
"SlaveInstanceType": "m1.small",
"InstanceCount": "1",'

def _get_dict_param(self, param_prefix):

    params = {}
    for (key, value) in self.querystring.items():
        if key.startswith(param_prefix):
            params[camelcase_to_underscores(key.replace(param_prefix, u''))] = value[0]
    return params
