KairosDB Support?

I'm not looking to merge this, really. This patch would break OpenTSDB. :smile: I am curious about your opinions on adding other datasources to metrilyx. Based on the code it looks as though abstracting out OpenTSDB was the plan, but the abstraction is a bit leaky. I'm happy to work on tightening that up so that the use of OpenTSDB versus Kairos is mostly transparent.

I'm primarily familiar with KairosDB so I look forward to some guide from you fine folks as to the two stores being compatible enough feature-wise to do this.

Thanks!