ABR Rules Collection creation
Created by: jeremco
Hi
This PR proposes modifications about ABRRulesCollection creation :
- Now instanciated by AbrController (function createAbrRuleCollection), no more in mediaplayer (removes a link)
- Not a singleton anymore (used only in ABRController)
- metricsModel, dashMetrics, mediaPlayerModel are given in config at the creation
- add a reset function called by ABRController::reset
Jérémie