Resolve "xta-test-server helm-chart mit Deployment und Keystore-Secrets/Certificate-Resources"

Closes #2 (closed)

src/main/helm/templates/default_secret.yaml

-apiVersion: v1
-kind: Secret
-metadata:
-  name: xta-test-server-default-secret
-  namespace: {{ include "app.namespace" . }}
-  labels:
-    {{- include "app.defaultLabels" . | indent 4 }}
-type: Opaque
-data:
-  keystorePassword: password
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