Parametrized multi_tenancy to enable/disable authentication to Contrail API

Change-Id: I30ef75171a64e9212c4fb296298617316007d2a9
diff --git a/tests/pillar/single.sls b/tests/pillar/single.sls
index 0c7b9a3..51b2732 100644
--- a/tests/pillar/single.sls
+++ b/tests/pillar/single.sls
@@ -16,6 +16,7 @@
       port: 9696
   config:
     version: 2.2
+    multi_tenancy: false
     enabled: true
     network:
       engine: neutron