[storages] try to handle the BFSS case (WIP)

5 jobs for topic/default/bfss-to-s3 in 4 minutes and 33 seconds (queued for 21 seconds)
latest
Status Name Job ID Coverage
  Test
passed flake8 #8550

00:00:39

passed py27 #8563

00:03:47

passed py3 #8564

00:03:24

failed py27 #8551

00:01:21

failed py3 #8552

00:02:01