prevent sending ContactRequest with no vCard

bug : the vcard sent was obtained trough a Person object returned by
contact() from a ContactMethod. But this Person may be never set.

fix : now we use the profile to get the vcard to send within the
ContactRequest.

[SS: improve ci msg; use Account's profile, rather than selected profile]

Change-Id: I21ef691e3fdd96a6e504989a1178444c0d4b90ef
Signed-off-by: Stepan Salenikovich <stepan.salenikovich@savoirfairelinux.com>
Reviewed-by: Stepan Salenikovich <stepan.salenikovich@savoirfairelinux.com>