PLATFORM-517 Add Elasticsearch/Kibana interface to Python commons

JIRA case: https://wikia-inc.atlassian.net/browse/PLATFORM-517

In order to complete https://wikia-inc.atlassian.net/browse/PLATFORM-309 myself and @macbre decided to abstract the Elasticsearch/Kibana related logic out of https://github.com/Wikia/cheetah and add it to Wikia's Python commons for future reuse.

@Wikia/platform-team - second pair of eyes, please. :-)
Unfortunately, this needs to be hardcoded for now.

We could export the list balancers to either env variable or MW config YAML file, but it's hard to tell where this library will be used.

Waiting for Consul :)