Returns the default collector settings

def get_default_config(self):
        """
        Returns the default collector settings
        """
        config = super(ElasticSearchCollector, self).get_default_config()
        config.update({
            'host':           '127.0.0.1',
            'port':           9200,
            'user':           '',
            'password':       '',
            'instances':      [],
            'scheme':         'http',
            'path':           'elasticsearch',
            'stats':          ['jvm', 'thread_pool', 'indices'],
            'logstash_mode': False,
            'cluster':       False,
        })
        return config