add __hash__ method to be able to use a bucket object inside a set or…

… a dictionary

minio/datatypes.py

@@ -64,6 +64,9 @@ def __eq__(self, other):
             return self.name == other
         return NotImplemented
 
+    def __hash__(self):
+        return hash(self.name)
+
 
 class ListAllMyBucketsResult:
     """LissBuckets API result."""