This bug was fixed in the package cloud-initramfs-tools - 0.38ubuntu1
--------------- cloud-initramfs-tools (0.38ubuntu1) artful; urgency=medium
* overlayroot: add 'noauto' to the options for the /media/root-ro fstab entry (LP: #1666573).
-- Scott Moser <email address hidden> Tue, 13 Jun 2017 16:52:16 -0400
This bug was fixed in the package cloud-initramfs -tools - 0.38ubuntu1
--------------- -tools (0.38ubuntu1) artful; urgency=medium
cloud-initramfs
* overlayroot: add 'noauto' to the options for the /media/root-ro
fstab entry (LP: #1666573).
-- Scott Moser <email address hidden> Tue, 13 Jun 2017 16:52:16 -0400