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. :-)
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