Switch to q35 machine type for test nodes

q35 is recommended as emulating modern baremetal with better support
for UEFI in general, and Secure Boot in particular.

Old pc type usage is removed, like IDE controller, PS2 mouse, manual
PSI addresses.

Change-Id: Ic33e0f23c5c514a45541534ddd68329d7b4d0480

devstack/tools/ironic/templates/vm.xml

@@ -3,7 +3,7 @@
   <memory unit='KiB'>{{ memory }}</memory>
   <vcpu>{{ cpus }}</vcpu>
   <os>
-    <type arch='{{ arch }}' machine='pc'>hvm</type>
+    <type arch='{{ arch }}' machine='q35'>hvm</type>
     {% if bootdev == 'network' and not uefi_loader %}
     <boot dev='{{ bootdev }}'/>
     {% endif %}
@@ -34,13 +34,9 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='{{ disk_format }}' cache='unsafe'/>
       <source file='{{ imagefile }}'/>
-          <target dev='vd{{ letter }}' bus='virtio'/>
-          <address type='pci' domain='0x0000' bus='0x00' slot='0x0{{ letter }}' function='0x0'/>
+      <target dev='vd{{ letter }}'/>
     </disk>
     {% endfor %}
-    <controller type='ide' index='0'>
-      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
-    </controller>
     {% for n in range(1, interface_count+1) %}
     <interface type='direct'>
       {% if n == 1 and mac %}
@@ -48,16 +44,11 @@
       {% endif %}
       <source dev='{{ "tap-" + name + "i" + n|string }}'/>
       <model type='{{ nicdriver }}'/>
-      <address type='pci' domain='0x0000' bus='0x01' slot='{{ "0x0" + n|string }}' function='0x0'/>
       {% if uefi_loader and bootdev == 'network' %}
       <boot order='{{ n|string }}'/>
       {% endif %}
     </interface>
     {% endfor %}
-    <input type='mouse' bus='ps2'/>
     {{ console }}
-    <memballoon model='virtio'>
-      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
-    </memballoon>
   </devices>
 </domain>