software/kvm: fix aio and cache parameter for direct disk access

This fixes 157dd7ab.

software/kvm/buildout.hash.cfg

@@ -55,7 +55,7 @@ md5sum = b7e87479a289f472b634a046b44b5257
 
 [template-kvm-run]
 filename = template/template-kvm-run.in
-md5sum = b3945eb1491120117c75a16b098a46ad
+md5sum = be750fb62f7057c97dd6c6887b2149cc
 
 [template-kvm-controller]
 filename = template/kvm-controller-run.in

software/kvm/template/template-kvm-run.in

@@ -64,8 +64,8 @@ for disk_device_path in '{{ parameter_dict.get("disk-device-path", "") }}'.split
     disk_info_list.append({
       'path': disk_device_path,
       'format': "raw",
-      'aio': {{ parameter_dict['disk-aio'] or "native" }},
-      'cache': {{ parameter_dict['disk-cache'] or "none" }},
+      'aio': "{{ parameter_dict['disk-aio'] or 'native' }}",
+      'cache': "{{ parameter_dict['disk-cache'] or 'none' }}",
     })
 
 if not disk_info_list: