misc: Show url on get failure
misc: Show url on get failure

Signed-off-by: Sam Lang <70ab3b98ad075c66e7d3501cb42b80a7e41da316@inktank.com>

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