CloneManager: Make sure to sync driver_name

tests/cli-test-xml/compare/clone-auto1.xml

@@ -20,9 +20,9 @@
   <devices>
     <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
     <disk type="block" device="floppy">
+      <driver type="vmdk" name="qemu"/>
       <target dev="fda" bus="fdc"/>
       <address type="drive" controller="0" bus="0" target="0" unit="0"/>
-      <driver name="qemu" type="raw"/>
       <source dev="/disk-pool/diskvol1-clone"/>
     </disk>
     <disk type="block" device="disk">
@@ -37,6 +37,7 @@
       <address type="drive" controller="0" bus="0" target="0" unit="1"/>
     </disk>
     <disk type="block" device="disk">
+      <driver type="qcow2"/>
       <source dev="/default-pool/collidevol1.img"/>
       <target dev="sdc" bus="scsi"/>
       <readonly/>

tests/clone-xml/managed-storage-out.xml

@@ -19,7 +19,7 @@
     <emulator>/usr/bin/qemu-kvm</emulator>
     <disk type="file" device="disk">
       <target dev="hda" bus="ide"/>
-      <driver type="vmdk"/>
+      <driver name="qemu" type="vmdk"/>
       <source file="/default-pool/new1.img"/>
     </disk>
     <disk type="block" device="disk">

tests/testdriver.xml

@@ -403,6 +403,7 @@
     <disk type='block' device='floppy'>
       <source dev='/disk-pool/diskvol1'/>
       <target dev='fda' bus='fdc'/>
+      <driver type="vmdk"/>
     </disk>
     <disk type='block' device='disk'>
       <source dev='/disk-pool/diskvol2'/>
@@ -415,6 +416,7 @@
     <disk type='block' device='disk'>
       <source dev='/default-pool/collidevol1.img'/>
       <target dev='sdc' bus='scsi'/>
+      <driver type="qcow2"/>
       <readonly/>
       <shareable/>
     </disk>

virtinst/CloneManager.py

@@ -522,6 +522,7 @@ class Cloner(object):
                 newd = VirtualDisk(self.conn)
                 newd.path = disk.path
                 newd.device = device
+                newd.driver_name = disk.driver_name
                 newd.driver_type = disk.driver_type
                 newd.target = disk.target
                 if validate: