[storages] When an attribute is None, do not delete a new S3 key

4 jobs for topic/default/refactor in 2 minutes and 56 seconds (queued for 30 seconds)
Status Name Job ID Coverage
  Test
passed check_manifest #109773

00:00:37

passed flake8 #109774

00:01:00

passed py27 #109775

00:02:20

passed py3 #109776

00:02:55