Fixed score and comment commands, the same test used in each command was incorrect
Added deletion in KnownPeerList, used after comment or score deletion
Change call to update() of KnownPeerList when userInfo is broadcasted, only use update if peer is already in list
Fixed tests : MusicComment, MusicScore, ProfileCategoriesAndContacts
Updated NetworkConnectionDisconnectionTest to follow update of KnownPeerList only when necessary