fix and remark on test_lifecycle_expiration_days0
fix and remark on test_lifecycle_expiration_days0

1. fix a python3-related KeyError exception

2. note here:  AWS documentation includes examples of "Days 0"
   in use, but boto3 will not accept them--this is why the days0
   test currently sets Days 1

3. delay increased to 30s, to avoid occasional failures due to
   jitter

Signed-off-by: Matt Benjamin <b5ea062884a8f3dc969ff57d1008615447c56296@redhat.com>

robbat2/s3-tests,robbat2/s3-tests,ceph/s3-tests,ceph/s3-tests