Code review comment for ~jocave/plainbox-provider-tpm2:move-to-roots-home

The merge was fine but running tests failed.

[trusty] [07:51:28] starting container
Device project added to trusty-testing
[xenial] [07:51:33] starting container
[xenial] [07:51:34] Unable to start ephemeral container!
[xenial] output: https://paste.ubuntu.com/p/gHZx4CkTDj/
[xenial] NOTE: unable to execute tests, marked as failed
[xenial] Destroying failed container to reclaim resources
[bionic] [07:51:48] starting container
[bionic] [07:51:49] Unable to start ephemeral container!
[trusty] [07:51:50] provisioning container
[bionic] output: https://paste.ubuntu.com/p/ymp684z5H7/
[bionic] NOTE: unable to execute tests, marked as failed
[bionic] Destroying failed container to reclaim resources
[trusty] [07:53:17] Starting tests...
[trusty] Found a test script: ./requirements/container-tests-provider-tpm2
[trusty] [07:54:47] container-tests-provider-tpm2: PASS
[trusty] [07:54:47] Fixing file permissions in source directory
[trusty] [07:54:47] Destroying container