Nicolas Jager authored Sep 13, 2017 and Sébastien Blin committed Oct 10, 2017

- this class allows to get accounts informations. Each account has
his own NewCallModel, ContactModel and ConversationModel.

- getAccountList() returns a list of account ids.

- getAccountInfo() returns informations about an account.

- references to the NewAccountModel called parents were removed from
the constructor because account::Info& is already storing a reference
to NewAccountModel.

Change-Id: Ib429520ec6751201e1bc6a45c9dc8d54c76e428a
Reviewed-by: Anthony Léonard <anthony.leonard@savoirfairelinux.com>