jams contact synchro - retrieve and display avatar + contact first name/last name
When the contact list is retrieved, only the username is displayed. vcard is exchanged after first interaction with the contact
Aim is to retrieve the avatar and contact first/name so info can be displayed directly when the user connects or the contact list is synchronized, without having to wait for an interaction between each contact to retrieve the vcard
even more important when we are in LDAP/AD config as we have no username