added test pillars for contrail backend

Change-Id: I3f9766fae6fd699c752bb1a2a13e96b67a65f110
diff --git a/tests/pillar/control_cluster.sls b/tests/pillar/control_cluster.sls
index 910265b..bc84995 100644
--- a/tests/pillar/control_cluster.sls
+++ b/tests/pillar/control_cluster.sls
@@ -7,6 +7,11 @@
     version: liberty
     backend:
       engine: contrail
+      host: 127.0.0.1
+      user: admin
+      password: password
+      token: token
+      tenant: admin
     bind:
       address: 127.0.0.1
       port: 9696