Add `non-pristine` key to `list-disks` action.
No longer attempt to do initializtion of `osd-journal` devices.
Make py27 test noop
Flip pep8 test to py3
Partial-Bug: #1698154
Change-Id: I0ca574fa7f0683b4e8a693b9f62fbf6b39689789
Depends-On: I90a866aa138d18e4242783c42d4c7c587f696d7d