CORD-2330 Add networks to slices before creating instances

Change-Id: Ic00a77eded9bd61b9e982cd6a30e587c8c152027
(cherry picked from commit ea2eb5e97cad3dbd9fba2c3458984b8bacae6e19)
diff --git a/xos/synchronizer/vepc_config.yaml b/xos/synchronizer/vepc_config.yaml
index 3e2d56d..f11ffb2 100644
--- a/xos/synchronizer/vepc_config.yaml
+++ b/xos/synchronizer/vepc_config.yaml
@@ -33,9 +33,14 @@
       - name: VENBServiceInstance
         networks: 
           - management
+          - s1u_network
+          - sgi_network
+          - s11_network
       - name: VSPGWCTenant
         networks: 
           - management
+          - s11_network
+          - spgw_network
         links:
           - name: VENBServiceInstance
             networks:
@@ -46,6 +51,9 @@
       - name: VSPGWUTenant
         networks: 
           - management
+          - s1u_network
+          - sgi_network
+          - spgw_network
         links:
           - name: VENBServiceInstance
             networks: