livemedia-creator: close the socket when done

In some cases the socket may not be closed, so make sure it is to
prevent hangs when shutting down the virt.

src/sbin/livemedia-creator

@@ -128,6 +128,7 @@ class LogRequestHandler(SocketServer.BaseRequestHandler):
                 break
 
     def finish(self):
+        self.request.close()
         self.fp.close()
 
     def iserror(self, line):