Description of problem:
Upstream bug: https://github.com/dracutdevs/dracut/issues/480
There is an odd interaction at play where having a `resume=` kernel command line arg as well as an initramfs that was built using `--no-hostonly --add iscsi` causes there to be a device timeout of the lvm swap device. This is occurring in Fedora 29 Atomic Host. A Fedora 29 Server system can show the problem easily by making sure `dracut-network` and `iscsi-initiator-utils` are installed and regenerating the initramfs with dracut -f --no-hostonly`.
I have determined that this behavior [started happening with the `048` release of dracut](https://pagure.io/atomic-wg/issue/513#comment-537020). There were only three commits since `047` on the iscsi module-setup.sh so maybe it is one of them: b31f3fe 9e82732 5e615f4
The symptom you will see is a system that takes 90 seconds longer to boot and error messages something like:
Oct 17 23:05:41 localhost systemd: dev-mapper-fedora\x2dswap.device: Job dev-mapper-fedora\x2dswap.device/start timed out.
Oct 17 23:05:41 localhost systemd: Timed out waiting for device dev-mapper-fedora\x2dswap.device.
Oct 17 23:05:41 localhost systemd: Dependency failed for Resume from hibernation using device /dev/mapper/fedora-swap.
There is a lot of detailed investigation over in https://pagure.io/atomic-wg/issue/513
Proposed as a Freeze Exception for 29-final by Fedora user dustymabe using the blocker tracking app because:
This late in the game I doubt this will make it into final but I'd like to at least get it added to known bugs.
Discussed during the 2018-10-22 blocker review meeting: 
The decision to classify this bug as an AcceptedFreezeException was made:
"This bug has been noted to be a "nice-to-have" fix, so we accept it as an AcceptedFreezeException."
dracut-049-11.git20181024.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2018-cf5015ab11
dracut-049-11.git20181024.fc29 has been pushed to the Fedora 29 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-cf5015ab11
dracut-049-11.git20181024.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.