Supports dpdk-based vm creation in OpenstackNetworking service.

Change-Id: I39c30cde5b455952a4c7ed0147903324c6598880
diff --git a/apps/openstacknode/network-cfg.json b/apps/openstacknode/network-cfg.json
index b173147..eea2fc1 100644
--- a/apps/openstacknode/network-cfg.json
+++ b/apps/openstacknode/network-cfg.json
@@ -25,6 +25,7 @@
               "password" : "password"
             },
             "datapathType" : "netdev",
+            "socketDir" : "/var/lib/libvirt/qemu",
             "controllers": [
               {
                 "ip": "10.10.10.2",