AETHER-761 Add support of private image registry with auth enabled

Change-Id: I25e804570357c513bfd1822ab9d971c7ed1c5405
diff --git a/omec/omec-control-plane/templates/statefulset-mme.yaml b/omec/omec-control-plane/templates/statefulset-mme.yaml
index 8dd2ea3..c0c180c 100644
--- a/omec/omec-control-plane/templates/statefulset-mme.yaml
+++ b/omec/omec-control-plane/templates/statefulset-mme.yaml
@@ -33,6 +33,10 @@
         {{ .Values.nodeSelectors.mme.label }}: {{ .Values.nodeSelectors.mme.value }}
     {{- end }}
       serviceAccountName: mme
+    {{- if .Values.images.credentials }}
+      imagePullSecrets:
+        - name: {{ .Release.Name }}.registry
+    {{- end }}
       initContainers:
       - name: mme-load-sctp-module
         image: {{ .Values.images.tags.init | quote }}