[FIX] add datetime.time to JSONEncoder

Author: serl

base_rest/http.py

@@ -50,6 +50,8 @@ def default(self, obj):  # pylint: disable=E0202,arguments-differ
             return obj.isoformat()
         elif isinstance(obj, datetime.date):
             return obj.isoformat()
+        elif isinstance(obj, datetime.time):
+            return obj.isoformat()
         elif isinstance(obj, decimal.Decimal):
             return float(obj)
         return super(JSONEncoder, self).default(obj)