Code review comment for ~jocave/plainbox-provider-snappy:add-plans-for-nesting

The merge was fine but running tests failed.

[bionic] [17:39:45] starting container
[xenial] [17:39:47] starting container
Device project added to bionic-testing
Device project added to xenial-testing
[bionic] [17:39:59] provisioning container
[bionic] [17:39:59] Unable to provision requirements in container!
[xenial] [17:40:00] provisioning container
[xenial] [17:40:00] Unable to provision requirements in container!
[xenial] output: https://paste.ubuntu.com/p/gZFmR3Ntpm/
[xenial] [17:40:02] Fixing file permissions in source directory
[bionic] output: https://paste.ubuntu.com/p/fXwNZhQr9C/
[bionic] [17:40:02] Fixing file permissions in source directory
[xenial] [17:40:02] Unable to fix permissions!
[trusty] [17:40:03] starting container
[bionic] [17:40:03] Unable to fix permissions!
Device project added to trusty-testing
[xenial] output: https://paste.ubuntu.com/p/ZXFZw5SzvN/
[xenial] Some files owned by root may have been left around, fix them manually with chown.
[xenial] Destroying failed container to reclaim resources
[bionic] output: https://paste.ubuntu.com/p/RCDBtqTp8c/
[bionic] Some files owned by root may have been left around, fix them manually with chown.
[bionic] Destroying failed container to reclaim resources
[trusty] [17:40:15] provisioning container
[trusty] [17:40:15] Unable to provision requirements in container!
[trusty] output: https://paste.ubuntu.com/p/bcffFtcBQY/
[trusty] [17:40:17] Fixing file permissions in source directory
[trusty] [17:40:17] Unable to fix permissions!
[trusty] output: https://paste.ubuntu.com/p/Ms2x4RK4TC/
[trusty] Some files owned by root may have been left around, fix them manually with chown.
[trusty] Destroying failed container to reclaim resources