Catch CommandFailedError and print debug info
Catch CommandFailedError and print debug info

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