Refactor k8s network section definitions. Contrail part.

Change-Id: I33f43f93bd748b2014585ff8a82510f92388223f
diff --git a/tests/pillar/pool_contrail4_0.sls b/tests/pillar/pool_contrail4_0.sls
index da58e06..ce5331e 100644
--- a/tests/pillar/pool_contrail4_0.sls
+++ b/tests/pillar/pool_contrail4_0.sls
@@ -51,7 +51,8 @@
     ca: kubernetes
     network:
       engine: opencontrail
-      version: 4.0
-      config:
-        api:
-          host: 127.0.0.1
+      contrail:
+        version: 4.0
+        config:
+          api:
+            host: 127.0.0.1