schedule_suite.sh: fix s3branch
schedule_suite.sh: fix s3branch

Signed-off-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@inktank.com>

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