Merge pull request #71 from shalder07/tier1_schema_change

tier1 always be None in GET tier config request for level 2

Author: marcserrat

connect/models/schemas.py

@@ -501,7 +501,7 @@ def make_object(self, data):
 
 class TierAccountsSchema(Schema):
     customer = fields.Nested(TierAccountSchema)
-    tier1 = fields.Nested(TierAccountSchema)
+    tier1 = fields.Nested(TierAccountSchema, allow_none=True)
     tier2 = fields.Nested(TierAccountSchema, allow_none=True)
 
     @post_load