tests: Use python3 compatible dict operation

This patch is made by using 2to3 command.

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

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

tests/hwsim/hostapd.py

@@ -413,7 +413,7 @@ def add_ap(apdev, params, wait_enabled=True, no_enable=False, timeout=30,
         for field in fields:
             if field in params:
                 hapd.set(field, params[field])
-        for f,v in params.items():
+        for f,v in list(params.items()):
             if f in fields:
                 continue
             if isinstance(v, list):