AWS: Configure minion routes dynamically

We need to implement the Routes interface, and then enable the functionality in the cluster scripts.

cluster/aws/ubuntu/common.sh

@@ -29,7 +29,6 @@ function generate-minion-user-data {
   # We pipe this to the ami as a startup script in the user-data field.  Requires a compatible ami
   echo "#! /bin/bash"
   echo "SALT_MASTER='${MASTER_INTERNAL_IP}'"
-  echo "MINION_IP_RANGE='${MINION_IP_RANGES[$i]}'"
   echo "DOCKER_OPTS='${EXTRA_DOCKER_OPTS:-}'"
   echo "readonly DOCKER_STORAGE='${DOCKER_STORAGE:-}'"
   grep -v "^#" "${KUBE_ROOT}/cluster/aws/templates/common.sh"