Revert "suite: don't schedule follow-on summary job for an empty run"
Revert "suite: don't schedule follow-on summary job for an empty run"

This reverts commit a2b7c728964fb0064ba2a69818289caf723f09fc.

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