Fix test with STRICT_JSON setting

Test is not overriding the intended setting, should be nested inside settings.REST_FRAMEWORK

Author: Jorrit

tests/test_utils.py

@@ -189,7 +189,7 @@ def test_loads(self):
             json.loads("NaN")
 
 
-@override_settings(STRICT_JSON=False)
+@override_settings(REST_FRAMEWORK={'STRICT_JSON': False})
 class NonStrictJsonFloatTests(JsonFloatTests):
     """
     'STRICT_JSON = False' should not somehow affect internal json behavior