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

Change-Id: I468803a89b24f76947bd6cf5dd605a66c3a0e884
diff --git a/deployment-configs/aether/apps/staging-omec-cp.yaml b/deployment-configs/aether/apps/staging-omec-cp.yaml
index 6386972..e7ff870 100644
--- a/deployment-configs/aether/apps/staging-omec-cp.yaml
+++ b/deployment-configs/aether/apps/staging-omec-cp.yaml
@@ -18,7 +18,7 @@
     apn: internet
     multiUpfs: true
     # can be any IP address, not used but crash without it
-    s1uAddr: "119.0.0.3"
+    s1uAddr: "192.168.251.3"
   mme:
     cfgFiles:
       config.json: