Add missing dependencies

jovial · jovial · commit 4612c5e916bf · 2018-09-28T14:15:30.000+01:00
These may be pulled in automatically, but adding them
explicitly just in case.
diff --git a/vars/Debian.yml b/vars/Debian.yml
@@ -3,3 +3,5 @@
 libvirt_host_libvirt_packages:
   - libvirt-bin
   - qemu-kvm
+  - python-libvirt
+  - python-lxml
