[Merge] lp:~rbalint/livecd-rootfs/livecd-rootfs-autopkgtest-fix into lp:livecd-rootfs

[Balint Reczey]

While my test did not trigger kpartx's nonzero return at least the passing path can be observed with the latest proposed version:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-zesty-rbalint-scratch/zesty/amd64/l/livecd-rootfs/20170421_152323_f7659@/log.gz

Relevant part from the log:
...
+ local kpartx_ret
+ local kpartx_stdout
+ '[' -n binary/boot/disk-uefi.ext4 ']'
+ sync
+ kpartx_ret=
++ kpartx -v -d binary/boot/disk-uefi.ext4
+ kpartx_stdout='del devmap : loop0p15
del devmap : loop0p14
del devmap : loop0p1
loop deleted : /dev/loop0'
+ echo 'del devmap : loop0p15
del devmap : loop0p14
del devmap : loop0p1
loop deleted : /dev/loop0'
del devmap : loop0p15
del devmap : loop0p14
del devmap : loop0p1
loop deleted : /dev/loop0
+ '[' -n '' ']'
+ unset backing_img
...


-- 
https://code.launchpad.net/~rbalint/livecd-rootfs/livecd-rootfs-autopkgtest-fix/+merge/322767
Your team Ubuntu Core Development Team is requested to review the proposed merge of lp:~rbalint/livecd-rootfs/livecd-rootfs-autopkgtest-fix into lp:livecd-rootfs.