Imagr does not identify target successfully after automaton deletes first volume

[Dave Lebbing]

build 20119

Imagr fails when run after automaton deletes first volume. Tested on 10.14 with Filevault enabled. Set automaton to delete first volume. When running workflow 6 (set to autorun) this showed output indicating an exception at MainController.py line 1000. Error message: ‘NoneType’ object has no attribute ‘mountpoint’.

https://twocanoes.atlassian.net/wiki/spaces/MDS/pages/719060996/Mac+Deploy+Stick+Test+Matrix

[timothy perfitt]

Please setup test system to replicate error.