Merge pull request #12960 from SUSE/wip-18546-kraken

kraken: [teuthology] update Ubuntu image url after ceph.com refactor

Reviewed-by: Jason Dillaman <dillaman@redhat.com>

qa/tasks/qemu.py

@@ -16,7 +16,7 @@
 log = logging.getLogger(__name__)
 
 DEFAULT_NUM_RBD = 1
-DEFAULT_IMAGE_URL = 'http://ceph.com/qa/ubuntu-12.04.qcow2'
+DEFAULT_IMAGE_URL = 'http://download.ceph.com/qa/ubuntu-12.04.qcow2'
 DEFAULT_MEM = 4096 # in megabytes
 
 def create_images(ctx, config, managers):