Enable leader election in the operator

The operator no longer runs leader-for-life election so enable
leader-with-lease via the CLI arg in the pod spec.

Signed-off-by: Tom Pantelis <tompantelis@gmail.com>

submariner-operator/templates/operator-deployment.yaml

@@ -27,8 +27,8 @@ spec:
         name: {{ template "submariner.fullname" . }}
     spec:
       containers:
-      - command:
-        - submariner-operator
+      - args:
+        - --leader-elect
         env:
         - name: WATCH_NAMESPACE
           valueFrom: