Add support for Fedora 20

The list of RPM packages have been updated to support the recently
released Fedora 20 distribution.

Closes-Bug: #1263291

Co-Authored: Alvaro Lopez Ortega <alvaro@gnu.org>
Change-Id: Ia66abef1a1a54e6d5ee6eebc12908cef3f1d211d
diff --git a/files/rpms/cinder b/files/rpms/cinder
index c4edb68..623c13e 100644
--- a/files/rpms/cinder
+++ b/files/rpms/cinder
@@ -4,3 +4,4 @@
 python-devel
 postgresql-devel
 iscsi-initiator-utils
+python-lxml         #dist:f18,f19,f20