Update all rpms for Fedora 28

Bring along the required rpms for the ride on Fedora 28 (we really
should find a way to maybe do f* or something to avoid this
... consider it a todo :)

Change-Id: I37fd38de9baab478c86d23ea2cebca59dc8a5ed1
diff --git a/files/rpms/nova b/files/rpms/nova
index 9fb7282..4140cd7 100644
--- a/files/rpms/nova
+++ b/files/rpms/nova
@@ -7,7 +7,7 @@
 genisoimage # required for config_drive
 iptables
 iputils
-kernel-modules # dist:f25,f26,f27
+kernel-modules # dist:f25,f26,f27,f28
 kpartx
 libxml2-python
 m2crypto