Update OpenVZ driver image

11.10 simply does not exist, so this simply does not work. However,
devstack-gate tries to pre-cache all images referenced, so even
though we're not doing anything with this, it's breaking devstack-gate.

Change-Id: I64b03ed387f5205a885427498e8cf8c2a5b32b91

Author: cboylan

stackrc

@@ -139,9 +139,9 @@ fi
 # which may be set in ``localrc``.  Also allow ``DEFAULT_IMAGE_NAME`` and 
 # ``IMAGE_URLS`` to be set directly in ``localrc``.
 case "$VIRT_DRIVER" in
-    openvz) 
-        DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-ubuntu-11.10-x86_64}
-        IMAGE_URLS=${IMAGE_URLS:-"http://download.openvz.org/template/precreated/ubuntu-11.10-x86_64.tar.gz"};;
+    openvz)
+        DEFAULT_IMAGE_NAME=${DEFAULT_IMAGE_NAME:-ubuntu-12.04-x86_64}
+        IMAGE_URLS=${IMAGE_URLS:-"http://download.openvz.org/template/precreated/ubuntu-12.04-x86_64.tar.gz"};;
     libvirt)
         case "$LIBVIRT_TYPE" in
             lxc) # the cirros root disk in the uec tarball is empty, so it will not work for lxc