Add DigitalOcean playbook to create VM

tests/templates/inventory-do.j2

@@ -0,0 +1,48 @@
+{% for instance in droplets.results %}
+node{{loop.index}} ansible_ssh_host={{instance.droplet.ip_address}}
+{% endfor %}
+
+{% if mode is defined and mode == "separate" %}
+[kube-master]
+node1
+
+[kube-node]
+node2
+
+[etcd]
+node3
+
+[vault]
+node3
+{% elif mode is defined and mode == "ha" %}
+[kube-master]
+node1
+node2
+
+[kube-node]
+node3
+
+[etcd]
+node2
+node3
+
+[vault]
+node2
+node3
+{% else %}
+[kube-master]
+node1
+
+[kube-node]
+node2
+
+[etcd]
+node1
+
+[vault]
+node1
+{% endif %}
+
+[k8s-cluster:children]
+kube-node
+kube-master