sfa-3.1-14

Setting tag sfa-3.1-14
for SSL & python-2.7.9: ignore server verification
assume 2.7: remove compat code - always use HTTPSConnection (not HTTPS anymore)
fix: Reset GIDs works even if user has no pub_key
tweak for ubuntu (that does not have systemctl)
iotlab driver:  fix ldap account creation at each lease
miscell cosmetic & layout