chore(provision-rackspace): bumped coreos image version

Author: Adam K Dean

contrib/rackspace/provision-rackspace-cluster.sh

@@ -49,7 +49,7 @@ $CONTRIB_DIR/util/check-user-data.sh
 i=1 ; while [[ $i -le $DEIS_NUM_INSTANCES ]] ; do \
     echo_yellow "Provisioning deis-$i..."
     # this image is CoreOS 452.0.0
-    supernova $ENV boot --image 7f116bdd-9b17-410c-b049-eb1bca1b7087 --flavor $FLAVOR --key-name $1 --user-data ../coreos/user-data --no-service-net --nic net-id=$NETWORK_ID --config-drive true deis-$i ; \
+    supernova $ENV boot --image 325a1c78-78e1-4367-be7a-1334b088018a --flavor $FLAVOR --key-name $1 --user-data ../coreos/user-data --no-service-net --nic net-id=$NETWORK_ID --config-drive true deis-$i ; \
     ((i = i + 1)) ; \
 done