Update for ElasticSearch authentication

[maxidea-com]

#399

es = elasticsearch.Elasticsearch(cfg.cfg["elastic"]["host"],
http_auth=(cfg.cfg["elastic"]["user"],cfg.cfg["elastic"]["pass"]),
verify_certs=False,
use_ssl=use_ssl)

[sabban]

Hi,
It's a great idea to use authentication against ES.
But I am not confident with providing security software that doesn't check ssl certificates.

Can you provide a patch that could make it optional (check the validity by default, and if the option is provided, bypass the check) ?

And if I have the time I will update the "new tool" https://github.com/nbs-system/nxtool-ng/blob/master/nxtool/log_providers/elastic.py the exact same way.

Thanks.