Update object_storage container creation using metadata tests to accept 204 reponses

2 object_storage test_create_container_with_remove_metadata tests are failing because they receive a 204 error when expecting a 202 or 201
This patch allows for the acceptance of 204 responses

Closes-Bug: #2026296
Change-Id: Idd99342481a693f6523e5b81c60d3ede6094cefb
diff --git a/tempest/lib/services/object_storage/container_client.py b/tempest/lib/services/object_storage/container_client.py
index ee87726..bdca0d0 100644
--- a/tempest/lib/services/object_storage/container_client.py
+++ b/tempest/lib/services/object_storage/container_client.py
@@ -43,7 +43,7 @@
         url = str(container_name)
 
         resp, body = self.put(url, body=None, headers=headers)
-        self.expected_success([201, 202], resp.status)
+        self.expected_success([201, 202, 204], resp.status)
         return resp, body
 
     # NOTE: This alias is for the usability because PUT can be used for both