py-tests: update forgotten cert fingerprint
py-tests: update forgotten cert fingerprint

This should have been part of 4314cfe5.

Signed-off-by: Apollon Oikonomopoulos <ed81ed0a45ccd5c8869bda52e38353a6299ee39e@debian.org>

ganeti/ganeti,mbakke/ganeti,ganeti/ganeti,mbakke/ganeti,mbakke/ganeti,ganeti/ganeti