Code review comment for ~sylvain-pineau/checkbox-ng:no_psutil_xenial

The merge was fine but running tests failed.

[xenial] [13:42:04] starting container
Device project added to xenial-testing
[bionic] [13:42:06] starting container
Device project added to bionic-testing
[xenial] [13:42:13] provisioning container
[bionic] [13:42:18] provisioning container
[bionic] [13:43:38] Unable to provision requirements in container!
[bionic] output: https://paste.ubuntu.com/p/JyJgBDSNmM/
[bionic] [13:43:41] Fixing file permissions in source directory
[bionic] Destroying failed container to reclaim resources
[xenial] [13:45:53] Unable to provision requirements in container!
[xenial] output: https://paste.ubuntu.com/p/8fvRfJT2Q7/
[xenial] [13:45:56] Fixing file permissions in source directory
[xenial] Destroying failed container to reclaim resources