Adapt tag.py to the move to hopsworks

Author: aversey

python/hopsworks/tag.py

@@ -18,7 +18,7 @@
 import json
 
 import humps
-from hsfs import util
+from hopsworks import util
 
 
 class Tag:
@@ -44,7 +44,7 @@ def to_dict(self):
         }
 
     def json(self):
-        return json.dumps(self, cls=util.FeatureStoreEncoder)
+        return json.dumps(self, cls=util.Encoder)
 
     @classmethod
     def from_response_json(cls, json_dict):