Implemented get_logs() for rekishi->influxdb.

And AdagiosInfluxDbSeriePoint class to wrap an influxdb list of series (being list of points) into something compatible with adagios needs.
Add: Enable snippets_log() case for rekishi.

snippets_log: better to use get_logs2().
Add: Enable state_history() case for rekishi.

a bit harder.
Add: Enable status_log() case for rekishi.

Better _status_log.