[Gizmo] Use nodePortPrefix variable

The services.yaml file should make use of nodePortPrefix in its
default nodePort declaration.

Change-Id: I5ac25a6448b760ffe04f43b052bbaf5341997934
Issue-ID: AAI-1349
Signed-off-by: Michael Arrastia <MArrasti@amdocs.com>
diff --git a/charts/aai-gizmo/templates/service.yaml b/charts/aai-gizmo/templates/service.yaml
index e78cc73..88948cf 100644
--- a/charts/aai-gizmo/templates/service.yaml
+++ b/charts/aai-gizmo/templates/service.yaml
@@ -29,7 +29,7 @@
   ports:
     {{if eq .Values.service.type "NodePort" -}}
     - port: {{ .Values.service.internalPort }}
-      nodePort: {{ .Values.global.nodePortPrefix | default "302" }}{{ .Values.service.nodePort }}
+      nodePort: {{ .Values.global.nodePortPrefix | default .Values.nodePortPrefix }}{{ .Values.service.nodePort }}
       name: {{ .Values.service.portName }}
     {{- else -}}
     - port: {{ .Values.service.externalPort }}