Adds script to check if router interface exists

Change-Id: I06f9e8b7230384f6a796c4e27e1bb1946b11101b

templates/gateway/check-router-interface-script.sh.erb

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Copyright 2016 Midokura SARL
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -e
+set -x
+
+HOSTNAME=$(hostname)
+HOST_ID=$(midonet-cli -A -e host list | grep ${HOSTNAME} | awk '{ print $2 }')
+NIC=<%= @nic %>
+
+while [ -z $(midonet-cli -A -e host ${HOST_ID} binding list | grep ${NIC}) ]; do
+  echo "ZzZ..."
+  sleep 5
+done
+
+exit 0
+