Support settimeout in QEMUMonitorProtocol

This method is used in the following qemu-ga-client script
to implement non-blocking operations.

Signed-off-by: Ryota Ozaki <ozaki.ryota@gmail.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/QMP/qmp.py b/QMP/qmp.py
index 5a573e1..33c7d36 100644
--- a/QMP/qmp.py
+++ b/QMP/qmp.py
@@ -162,3 +162,8 @@
     def close(self):
         self.__sock.close()
         self.__sockfile.close()
+
+    timeout = socket.timeout
+
+    def settimeout(self, timeout):
+        self.__sock.settimeout(timeout)