Port to py.test
Port to py.test

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