This test boots into an old MicroOS image. It fails because combustion failed
to run, which is caused by transactional-updates self update:

Feb 21 05:49:26.233585 localhost combustion[542]: New version found -
updating...
Feb 21 05:49:26.374352 localhost combustion[703]: Loading repository data...
Feb 21 05:49:26.584979 localhost combustion[703]: Reading installed packages...
Feb 21 05:49:26.884304 localhost combustion[703]: Retrieving package
transactional-update-3.1.4-1.1.x86_64 (1/1),  54.6 KiB ( 73.1 KiB unpacked)
Feb 21 05:49:27.121761 localhost combustion[703]: .........done]
Feb 21 05:49:27.306095 localhost combustion[742]: Loading repository data...
Feb 21 05:49:27.517683 localhost combustion[742]: Reading installed packages...
Feb 21 05:49:27.771859 localhost combustion[742]: Retrieving package
libtukit0-3.1.4-1.1.x86_64 (1/2), 128.4 KiB (283.7 KiB unpacked)
Feb 21 05:49:28.000220 localhost combustion[742]: ..........done]
Feb 21 05:49:28.002964 localhost combustion[742]: Retrieving package
tukit-3.1.4-1.1.x86_64 (2/2),  55.9 KiB ( 85.2 KiB unpacked)
Feb 21 05:49:28.148466 localhost combustion[742]: ......done]
Feb 21 05:49:28.209932 localhost combustion[741]:
/tmp/transactional-update.a1AVPfXW9o/usr/sbin/tukit: /lib64/libselinux.so.1: no
version information available (required by
/tmp/transactional-update.a1AVPfXW9o/usr/lib64/libtukit.so.0)
Feb 21 05:49:28.215355 localhost combustion[542]: transactional-update 3.1.4
started
Feb 21 05:49:28.217252 localhost combustion[542]: Options: shell
Feb 21 05:49:28.271971 localhost combustion[542]: Separate /var detected.
Feb 21 05:49:28.320210 localhost combustion[741]: tukit:
/lib64/libselinux.so.1: no version information available (required by
/tmp/transactional-update.a1AVPfXW9o/usr/lib64/libtukit.so.0)
Feb 21 05:49:28.328102 localhost combustion[741]: Failure (dbus fatal
exception).
...
Feb 21 05:49:29.012290 localhost combustion[741]: ERROR: filesystem error:
cannot copy: File exists [/run/netconfig]
[/.snapshots/2/snapshot/run/netconfig]
Feb 21 05:49:29.013155 localhost combustion[542]: Opening chroot in snapshot ,
continue with 'exit'
Feb 21 05:49:29.013981 localhost combustion[877]: tukit:
/lib64/libselinux.so.1: no version information available (required by
/tmp/transactional-update.a1AVPfXW9o/usr/lib64/libtukit.so.0)
Feb 21 05:49:29.015824 localhost combustion[877]: 2021-02-21 05:49:29 tukit
3.1.4 started
...

## Observation

openQA test in scenario
microos-Tumbleweed-MicroOS-Image-x86_64-microos-old2microosnext@64bit fails in
[image_checks](https://openqa.opensuse.org/tests/1638401/modules/image_checks/steps/13)

## Test suite description
Boot from existing, static MicroOS image and transactional-update dup to
snapshot under test


## Reproducible

Fails since (at least) Build
[20210219](https://openqa.opensuse.org/tests/1636750)


## Expected result

Last good: [20210218](https://openqa.opensuse.org/tests/1635223) (or more
recent)


## Further details

Always latest result in this scenario:
[latest](https://openqa.opensuse.org/tests/latest?arch=x86_64&distri=microos&flavor=MicroOS-Image&machine=64bit&test=microos-old2microosnext&version=Tumbleweed)