fix the python test

Author: Jayant Krishnamurthy

pyth/tests/test_update_price.py

@@ -116,6 +116,6 @@ def get_publisher_acc(product_acc):
             assert publisher_acc['price'] == new_values[product]['price']
             assert publisher_acc['conf'] == new_values[product]['conf']
 
-            conf_threshold = new_values[product]['price'] / 20
+            conf_threshold = new_values[product]['price'] / 3
             expected_status = 'unknown' if new_values[product]['conf'] > conf_threshold else 'trading'
             assert publisher_acc['status'] == expected_status