Add Debian OS support in DevStack

Fix bug #1176216

Change-Id: Ia94c332f02a921a936db249dc3b4a7ae4eff0400
diff --git a/stackrc b/stackrc
index f99eab1..6d6f7bf 100644
--- a/stackrc
+++ b/stackrc
@@ -162,6 +162,11 @@
 # also install an **LXC** or **OpenVZ** based system.
 VIRT_DRIVER=${VIRT_DRIVER:-libvirt}
 LIBVIRT_TYPE=${LIBVIRT_TYPE:-kvm}
+if [[ "$os_VENDOR" =~ (Debian) ]]; then
+  LIBVIRT_GROUP=libvirt
+else
+  LIBVIRT_GROUP=libvirtd
+fi
 
 # Specify a comma-separated list of UEC images to download and install into glance.
 # supported urls here are: