Tweak regex to work for non-FQDN hostnames
Tweak regex to work for non-FQDN hostnames

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