Add testcase for multi resource template (#245)

User can combine multiple resources in the given template
file, which can be consumed by k8s module to create multiple
resources at once.

Fixes: #243

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

molecule/default/templates/pod_template_three.j2

@@ -0,0 +1,35 @@
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  labels:
+    app: "{{ k8s_pod_name_one }}"
+  name: '{{ k8s_pod_name_one }}'
+  namespace: '{{ k8s_pod_namespace }}'
+spec:
+  containers:
+  - args:
+    - /bin/sh
+    - -c
+    - while true; do echo $(date); sleep 10; done
+    image: python:3.7-alpine
+    imagePullPolicy: Always
+    name: '{{ k8s_pod_name_one }}'
+
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  labels:
+    app: "{{ k8s_pod_name_two }}"
+  name: '{{ k8s_pod_name_two }}'
+  namespace: '{{ k8s_pod_namespace }}'
+spec:
+  containers:
+  - args:
+    - /bin/sh
+    - -c
+    - while true; do echo $(date); sleep 10; done
+    image: python:3.7-alpine
+    imagePullPolicy: Always
+    name: '{{ k8s_pod_name_two }}'