Fix bug that thought all >1 node clusters always had core dumps.
Fix bug that thought all >1 node clusters always had core dumps.

Accidentally shared the stdout between all the runs.

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