If a job was marked 'dead' by a task, retain that status on failure
If a job was marked 'dead' by a task, retain that status on failure

Signed-off-by: Andrew Schoen <1bb641dc23c3a93cce4eee683bcf4b2bea7903a3@redhat.com>

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