misc: Don't include existing partitions in devs
misc: Don't include existing partitions in devs

We don't want to include /dev/sda1, etc. in the
list of devices to use.

Signed-off-by: Sam Lang <70ab3b98ad075c66e7d3501cb42b80a7e41da316@inktank.com>

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