Update Aether yaml files: change s1u nets and add sercomm enb configs

Change-Id: I468803a89b24f76947bd6cf5dd605a66c3a0e884
diff --git a/deployment-configs/aether/apps/production-omec-cp-gcp.yaml b/deployment-configs/aether/apps/production-omec-cp-gcp.yaml
index 0e3fd56..01f98a0 100644
--- a/deployment-configs/aether/apps/production-omec-cp-gcp.yaml
+++ b/deployment-configs/aether/apps/production-omec-cp-gcp.yaml
@@ -20,7 +20,7 @@
   spgwc:
     apn: internet
     multiUpfs: true
-    s1uAddr: "119.0.0.7"
+    s1uAddr: "192.168.251.7"
   mme:
     cfgFiles:
       config.json: