Adding tls support for libvirt

The patchs adds TLS support in case of it is enabled for
nova compute process.

Change-Id: Ie14de155befc2f042f5425c22c4913a2b0f1913c
Related-PROD: PROD-23583
diff --git a/tests/pillar/agent_cluster.sls b/tests/pillar/agent_cluster.sls
index 75d87ab..1ba1dfb 100644
--- a/tests/pillar/agent_cluster.sls
+++ b/tests/pillar/agent_cluster.sls
@@ -12,6 +12,10 @@
             - "*"
           interval: 100
     debug: true
+    libvirt:
+      ssl:
+        enabled: true
+      libvirt_uri: qemu://
     region: RegionOne
     enabled: true
     version: liberty