our curtin_userdata file
** Attachment added: "curtin_userdata"
https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1743966/+attachment/5041044/+files/curtin_userdata
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I applied the patch on MaaS 2.2.3 and seems it broke deployment of nodes
where `if third_party_drivers` condition is true in
/etc/maas/preseeds/curtin_userdata.
I'm attaching part of /var/log/maas/regiond.log where it failed.
** Attachment added: "maas"
