Add security context template at pod/container level for etcd chart

This change implements runAsUser flag at pod level and readOnly-fs
flag at container level

Change-Id: Idcb78a1125b51e3b2a71c8cab0e97246c3f1c5aa

etcd/templates/deployment.yaml

@@ -40,6 +40,7 @@ spec:
 {{ tuple $envAll | include "helm-toolkit.snippets.release_uuid" | indent 8 }}
         configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "helm-toolkit.utils.hash" }}
     spec:
+{{ dict "envAll" $envAll "application" "etcd" | include "helm-toolkit.snippets.kubernetes_pod_security_context" | indent 6 }}
       serviceAccountName: {{ $rcControllerName | quote }}
       affinity:
 {{ tuple $envAll "etcd" "server" | include "helm-toolkit.snippets.kubernetes_pod_anti_affinity" | indent 8 }}
@@ -50,6 +51,7 @@ spec:
       containers:
         - name: etcd
 {{ tuple $envAll "etcd" | include "helm-toolkit.snippets.image" | indent 10 }}
+{{ dict "envAll" $envAll "application" "etcd" "container" "etcd" | include "helm-toolkit.snippets.kubernetes_container_security_context" | indent 10 }}
           command:
             - /tmp/etcd.sh
           ports:

etcd/values.yaml

@@ -51,6 +51,14 @@ dependencies:
       jobs: null
 
 pod:
+  security_context:
+    etcd:
+      pod:
+        runAsUser: 65534
+      container:
+        etcd:
+          runAsUser: 0
+          readOnlyRootFilesystem: false
   affinity:
     anti:
       type: