Provide a scoring module for Watcher

The watcher scoring module is a generic machine learning service. This module can be used to provide for example any predictions or classification that can be used by a strategy.

The module is in charge of storing a "generic learning model" which has been trained and evaluated by an external engine (spark, scikit-learn, TAP, R, ...)

The "generic learning model" is an abstraction that allows the engine to store the results. The aim of the abstraction is to avoid any strong coupling with any external learning solutions. but also to have a better consistency between the different Strategies.

The engine will collect the data from Ceilometer or message broker for online learning, etc.

This module is independent and optional.