Code review comment for ~jocave/checkbox-support:snapd-install-improvements

The merge was fine but running tests failed.

[xenial] [13:45:56] starting container
[bionic] [13:45:56] starting container
Device project added to xenial-testing
Device project added to bionic-testing
[xenial] [13:46:06] provisioning container
[bionic] [13:46:11] provisioning container
[xenial] [13:46:37] Unable to provision requirements in container!
[xenial] output: https://paste.ubuntu.com/p/4bCRvWpk5m/
[xenial] [13:46:39] Fixing file permissions in source directory
[xenial] Destroying failed container to reclaim resources
[bionic] [13:47:05] Unable to provision requirements in container!
[bionic] output: https://paste.ubuntu.com/p/JcgFcQj3R9/
[bionic] [13:47:07] Fixing file permissions in source directory
[bionic] Destroying failed container to reclaim resources