meta-data bug in Cloud Init 0.7.5

CernVM 3.7.2 has Cloud Init 0.7.5 (rather than 0.7.2 previously) and this introduced a bug in the construction of EC2/OpenStack meta-data URLs: the EC2 specs says requests for meta-data directory listings should include the trailing slash but 0.7.5 omits this. ( https://bugs.launchpad.net/cloud-init/+bug/1356855 ) This was fixed in Cloud Init 0.7.6 from October 2014.