Add exception hook
Add exception hook

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