THRIFT-5777: python fix mismatched timeout exceptions

Client: ["python"]
diff --git a/lib/py/test/test_sslsocket.py b/lib/py/test/test_sslsocket.py
index a5ea06a..2cbf5f8 100644
--- a/lib/py/test/test_sslsocket.py
+++ b/lib/py/test/test_sslsocket.py
@@ -19,6 +19,7 @@
 
 import inspect
 import logging
+import time
 import os
 import platform
 import ssl
@@ -76,7 +77,9 @@
         try:
             self._client = self._server.accept()
             if self._client:
-                self._client.read(5)  # hello
+                data = self._client.read(5)  # hello/sleep
+                if data == b"sleep":
+                    time.sleep(2)
                 self._client.write(b"there")
         except Exception:
             logging.exception('error on server side (%s):' % self.name)