Add test for teuthology.suite.build_email_body()
Add test for teuthology.suite.build_email_body()

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