Merge branch 'nvidiaxorg' into 'master'

add a flag to nvidia-xconfig because it is not inputing busids for the m3f class nodes

See merge request !124

roles/gpu/tasks/main.yml

@@ -136,7 +136,7 @@
   become_user: root
 
 - name: Configure xorg.conf with nvidia-xconfig so xorg.conf matches gpu number
-  shell: /usr/bin/nvidia-xconfig -a --use-display-device=none
+  shell: /usr/bin/nvidia-xconfig -a --use-display-device=none --preserve-busid
   become: true
   become_user: root
   args: