As mentioned in comment #6, this fix will be needed in Xenial too (I just tried with MAAS 2.3.0-6434-gd354690-0ubuntu1~16.04.1 and curtin 0.1.0~bzr532-0ubuntu1~16.04.1)
As mentioned in comment #6, this fix will be needed in Xenial too (I just tried with MAAS 2.3.0-6434- gd354690- 0ubuntu1~ 16.04.1 and curtin 0.1.0~bzr532- 0ubuntu1~ 16.04.1)