minor changes

chains/yohananof.py

@@ -0,0 +1,11 @@
+from chains.cerberus_web_client import CerberusWebClient
+from supermarket_chain import SupermarketChain
+
+
+class Yohananof(CerberusWebClient, SupermarketChain):
+    _date_hour_format = '%Y-%m-%d %H:%M:%S'
+    _class_name = 'Yohananof'
+
+    @property
+    def username(self):
+        return self._class_name