ceph.conf: bdev debug aio = true
ceph.conf: bdev debug aio = true

detect aio stalls

Signed-off-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@redhat.com>

ceph/teuthology,ktdreyer/teuthology,dmick/teuthology,ceph/teuthology,dmick/teuthology,SUSE/teuthology,SUSE/teuthology,dmick/teuthology,SUSE/teuthology,ktdreyer/teuthology