tests: Use python3 compatible "except" statement

This patch is made by using 2to3 command.

$ find . -name *.py | xargs 2to3 -f except -w -n

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>

tests/hwsim/fst_module_aux.py

@@ -629,7 +629,7 @@ class FstAP (FstDevice):
             self.remove_all_sessions()
             try:
                 self.send_iface_detach_request(self.iface)
-            except Exception, e:
+            except Exception as e:
                 logger.info(str(e))
         self.reg_ctrl.stop()
         del self.global_instance