Improve script a little bit.

examples/createPod.sh

@@ -1,11 +1,26 @@
-#creates a pod and runs Example.java(list pods for all namespaces) on starting of pod
-export REPO_ROOT=$(pwd)/../
+#!/bin/bash
 
-cd ${REPO_ROOT}/kubernetes
+# creates a pod and runs 
+# Example.java(list pods for all namespaces) on starting of pod
+
+# Exit on any error.
+set -e
+
+if ! which minikube > /dev/null; then
+  echo "This script requires minikube installed."
+  exit 100
+fi
+
+dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+export REPO_ROOT=${dir}/..
+
+cd ${REPO_ROOT}
 mvn install
 
 cd ${REPO_ROOT}/examples
 mvn package
+
 eval $(minikube docker-env)
 docker build -t test/examples:1.0 .
 kubectl apply -f test.yaml