ceph_manager::wait_for_clean: reset timeout if we make progress
ceph_manager::wait_for_clean: reset timeout if we make progress

Fixes: #7748
Signed-off-by: Samuel Just <8c40222f34b9721b5d5709d4ed45337913ea1c3e@inktank.com>

dmick/teuthology,tchaikov/teuthology,ktdreyer/teuthology,ceph/teuthology,t-miyamae/teuthology,robbat2/teuthology,zhouyuan/teuthology,ceph/teuthology,caibo2014/teuthology,SUSE/teuthology,caibo2014/teuthology,ivotron/teuthology,tchaikov/teuthology,yghannam/teuthology,dreamhost/teuthology,dmick/teuthology,dreamhost/teuthology,t-miyamae/teuthology,zhouyuan/teuthology,ivotron/teuthology,SUSE/teuthology,dmick/teuthology,robbat2/teuthology,SUSE/teuthology,michaelsevilla/teuthology,ktdreyer/teuthology,michaelsevilla/teuthology,yghannam/teuthology