Support globalnet image specification

This is necessary to allow globalnet image to be stored in local
registry.

submariner/templates/globalnet.yaml

@@ -25,8 +25,8 @@ spec:
         submariner.io/gateway: 'true'
       containers:
         - name: {{ template "submariner.fullname" . }}-globalnet
-          image: submariner-globalnet:local
-          imagePullPolicy: IfNotPresent
+          image: {{ .Values.globalnet.image.repository }}:{{ .Values.globalnet.image.tag }}
+          imagePullPolicy: {{ .Values.globalnet.image.pullPolicy }}
           env:
             - name: SUBMARINER_CLUSTERID
               value: '{{ .Values.submariner.clusterId }}'

submariner/values.yaml

@@ -49,6 +49,11 @@ routeAgent:
   nodeSelector: {}
   tolerations: []
   affinity: {}
+globalnet:
+  image:
+    repository: submariner-globalnet
+    tag: local
+    pullPolicy: IfNotPresent
 serviceAccounts:
   engine:
     create: true