Wrap COSMOS API

[YohannParis]

Why
Right now the COSMOS API is too intertwined within HMI. So that if the API breaks or evolves, we have to update multiple parts.

i.e. #200, the CosmosSearchObjectsInterface and CosmosArtifactInterface are consumed similarly, but they are entirely different types; which creates unnecessary tests to handle both of them.

How
Create a Class wrapper (or another mean) to consume COSMOS API.

Source
Integration with COSMOS and xDD — ASKE, Uncharted Google Docs

[mj3cheun]

@adamocarolli this could tie in with the generalization work you are doing at the moment? we should have a chat about this.