Update transfer_vhd to handle unicode correctly.

Python 2.4's shlex implementation doesn't seem to like unicode.
This updates the XenServer migration plugin so it converts to
ascii before shlex'ing the rsync args.

Fixes OSAPI resizes when using XenServer.

Fixes LP Bug #955064.

Change-Id: I7f2681bfe64ccde449a87c68b9739866a381a213

plugins/xenserver/xenapi/etc/xapi.d/plugins/migration

@@ -112,8 +112,10 @@ def transfer_vhd(session, args):
 
     ssh_cmd = '\"ssh -o StrictHostKeyChecking=no\"'
 
-    rsync_args = shlex.split('nohup /usr/bin/rsync -av -e %s %s %s'
-            % (ssh_cmd, source_path, dest_path))
+    # NOTE(dprince): shlex python 2.4 doesn't like unicode so we
+    # explicitly convert to ascii
+    rsync_args = shlex.split(('nohup /usr/bin/rsync -av -e %s %s %s'
+            % (ssh_cmd, source_path, dest_path)).encode('ascii'))
 
     logging.debug('rsync %s' % (' '.join(rsync_args, )))