Splitio-client

- Updated terminology on the SDKs codebase to be more aligned with current standard without causing a breaking change. The core change is the term split for feature flag on things like logs and code documentation comments.
- Added detailed debug logging for redis adapter.
- Fixed setting defaultTreatment to 'control' if it is missing in localhost JSON file.

- Fixed storing incorrect Telemetry method latency data

- Added support to use JSON files in localhost mode.
- Updated default periodic telemetry post time to one hour.
- Fixed unhandeled exception in push.manager.py class when SDK is connected to split proxy

- Updated SDK telemetry storage, metrics and updater to be more effective and send less often.
- Removed deprecated threading.Thread.setDaemon() method.

- Fixed RedisSenderAdapter instantiation to store mtk keys.

- Changed redis record type for impressions counts from list using rpush to hashed key using hincrby.
- Apply Timeout Exception when incorrect SDK API Key is used.
- Changed potential initial fetching segment Warning to Debug in logging.