The first VPS on every VPSHOST runs off the VPSHOST root drive. Because
of this, the root drive is filling up due to the addition of another OSD
drive: https://github.com/ceph/teuthology/pull/1099
This not only results in nagios alerts but could also result in needless
job failures. OSD drives/partitions are already only 100G on smithi so
this should be fine.
Signed-off-by: David Galloway <dgallowa@redhat.com>