--summary: add total counts, also note free machines
--summary: add total counts, also note free machines

Signed-off-by: Dan Mick <b07550071eaa6a9296289c43bbd6c90559196431@inktank.com>
Reviewed-by: Josh Durgin <51652c783f70f5b272ebd02f1fd20d3af7a2449f@inktank.com>

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