- Adjust xen-dom0-modules.service to run Before xenstored.service

instead of proc-xen.mount to workaround a bug in systemd "design"
  (bnc#959845)

OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=391

xen-dom0-modules.service

@@ -1,7 +1,7 @@
 [Unit]
 Description=Load dom0 backend drivers
 ConditionPathExists=/proc/xen
-Before=proc-xen.mount
+Before=xenstored.service xen-watchdog.service
 
 [Install]
 WantedBy=multi-user.target