Comment 18 for bug 1537095

I'm hitting exactly this, with:
- trusty maas node
- maas 1.9.3+bzr4577-0ubuntu1 (upgraded from 1.9.0)
- only 14.04 LTS images at maas
- juju 1.24.7 (preferred vs 1.25 as it's less race-y)
, when doing:

juju bootstrap --upload-tools --series trusty
-> http://paste.ubuntu.com/21029935/

If I let 16.04 images at maas, above cmd succeeds, but
deploys a xenial unit.