Refactor manager and tasks to remove reliance on files.

3 jobs for !1458 with 2016-2017-2018-removable-drive-reader-writer in 9 minutes and 59 seconds (queued for 1 minute and 27 seconds)
latest detached
Status Job ID Name Coverage
  Test
passed #9694
test

00:09:59

 
  Optional Tests
manual #9695
kvm allowed to fail manual
android test
manual #9696
allowed to fail manual
bridge test