Fix vagrant regression, add flag to easily enable v1beta3

cluster/vagrant/config-default.sh

@@ -66,3 +66,7 @@ ENABLE_CLUSTER_DNS=true
 DNS_SERVER_IP="10.247.0.10"
 DNS_DOMAIN="kubernetes.local"
 DNS_REPLICAS=1
+
+# Optional: Enable setting flags for kube-apiserver to turn on behavior in active-dev
+RUNTIME_CONFIG=""
+#RUNTIME_CONFIG="api/v1beta3"

cluster/vagrant/provision-master.sh

@@ -76,6 +76,7 @@ grains:
   roles:
     - kubernetes-master
   admission_control: AlwaysAdmit
+  runtime_config: '$(echo "$RUNTIME_CONFIG" | sed -e "s/'/''/g")'
 EOF
 
 mkdir -p /srv/salt-overlay/pillar

cluster/vagrant/util.sh

@@ -78,6 +78,7 @@ function create-provision-scripts {
     echo "ENABLE_CLUSTER_DNS='${ENABLE_CLUSTER_DNS:-false}'"
     echo "DNS_SERVER_IP='${DNS_SERVER_IP:-}'"
     echo "DNS_DOMAIN='${DNS_DOMAIN:-}'"
+    echo "RUNTIME_CONFIG='${RUNTIME_CONFIG:-}'"
     grep -v "^#" "${KUBE_ROOT}/cluster/vagrant/provision-master.sh"
   ) > "${KUBE_TEMP}/master-start.sh"