xend: Sleep before sending SIGKILL to device model

diff -r c9dc7dcacc1d tools/python/xen/xend/image.py
--- a/tools/python/xen/xend/image.py	Mon Jan 26 11:22:03 2009 +0000
+++ b/tools/python/xen/xend/image.py	Wed Jan 28 16:25:06 2009 +0900
@@ -574,7 +574,9 @@
                     # This is expected if Xend has been restarted within the
                     # life of this domain.  In this case, we can kill the process,
                     # but we can't wait for it because it's not our child.
-                    # We just make really sure it's going away (SIGKILL) first.
+                    # We just sleep for a reasonable period of time and
+                    # make really sure it's going away (SIGKILL) first.
+                    time.sleep(2)
                     os.kill(self.pid, signal.SIGKILL)
                 state = xstransact.Remove("/local/domain/0/device-model/%i"
                                           % self.vm.getDomid())