BROADCASTP-1 : Centralization of getting the httpResponse content in string at the HubScoreAPI class

BROADCASTP-1 : Centralisation of the token management + Modification of the parametter name "typeSubscription" in methods signature

BROADCASTP-1 : Remove httpAccess dependency (we need httpResponse codes that are not provided by this httpAccess plugin), + format

BROADCASTP-1 : Isolate http calls in order to automatize and mutulise the regeneration of an expired token