test: Wait for tier removal before next test starts

Fixes: #7860

Signed-off-by: David Zafman <david.zafman@inktank.com>
logrotate improvement: do not rotate empty logs

Signed-off-by: Dmitry Smirnov <onlyjob@member.fsf.org>
Merge pull request #1541 from onlyjob/debian

logrotate improvement: do not rotate empty logs

Reviewed-by: Sage Weil <sage@inktank.com>
Merge pull request #1540 from ceph/wip-7860

test: Wait for tier removal before next test starts

Reviewed-by: Sage Weil <sage@inktank.com>