OZG-4453 add helm deployment unit test for dns config

ozgcloud-elasticsearch-operator/src/test/helm/deployment_template_spec_test.yaml

@@ -50,3 +50,17 @@ tests:
       - equal:
           path: spec.template.spec.restartPolicy
           value: Always
+
+  - it: validate dns config
+    set:
+      image:
+        name: hase
+        tag: latest
+      imagePullSecret: imagePullSecret
+    asserts:
+      - equal:
+          path: spec.template.spec.dnsConfig
+          value: {}
+      - equal:
+          path: spec.template.spec.dnsPolicy
+          value: ClusterFirst
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