tests: Remove temporary config file in wpas_config_file

The new wpa_supplicant configuration file writing style leaves behind
the temporary file (<filename>.tmp) if renaming fails. Clean that up in
the test case execution.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

tests/hwsim/test_wpas_config.py

@@ -132,6 +132,10 @@ def test_wpas_config_file(dev):
             os.remove(config)
         except:
             pass
+        try:
+            os.remove(config + ".tmp")
+        except:
+            pass
         try:
             os.rmdir(config)
         except: