adding s_tag to att_subscriber for flex pod

Change-Id: I0c16bdb78f6fba979c4130bbb55c05ddc2825764
diff --git a/tosca-configs/att-workflow/flex-pod1-olt-subscriber.yaml b/tosca-configs/att-workflow/flex-pod1-olt-subscriber.yaml
index b17c451..4914bfd 100755
--- a/tosca-configs/att-workflow/flex-pod1-olt-subscriber.yaml
+++ b/tosca-configs/att-workflow/flex-pod1-olt-subscriber.yaml
@@ -29,6 +29,7 @@
       properties:
         name: My House-305
         status: pre-provisioned
+        s_tag: 111
         c_tag: 999
         onu_device: ALPHe3d1cfa7
         nas_port_id : "PON 1/1/03/1:1.1.1"