xosEndpoint in VTN should target Chameleon, not the XOS core.

Change-Id: I3652b10360c0d6a92e2214627eb312c2c595ce72
diff --git a/roles/cord-profile/templates/vtn-service.yaml.j2 b/roles/cord-profile/templates/vtn-service.yaml.j2
index 8eb4c4b..bcbd830 100644
--- a/roles/cord-profile/templates/vtn-service.yaml.j2
+++ b/roles/cord-profile/templates/vtn-service.yaml.j2
@@ -47,7 +47,7 @@
           sshUser: root
           sshKeyFile: /root/node_key
           sshPort: 22
-          xosEndpoint: http://xos:{{ xos_ui_port }}/
+          xosEndpoint: xos-chameleon:{{ xos_chameleon_port }}
           xosUser: {{ xos_admin_user }}
           xosPassword: {{ xos_admin_pass }}
           replaces: service_vtn