ci_fairy: Include commit SHA in junit error

It is already included in the testsuite name, but that isn't shown
in gitlab's UI, with the result that the front-page error report
is often useless and the user has to check out the pipeline logs.

Signed-off-by: Florian Müllner <fmuellner@gnome.org>
16 jobs for master in 10 minutes and 35 seconds (queued for 3 seconds)
Child pipeline (parent)
Status Job ID Name Coverage
  Debian Container Build
passed #7645215
aarch64
debian:buster@container-build@aarch64

00:00:56

passed #7645208
debian:buster@container-build@x86_64

00:01:07

passed #7645223
kvm
debian:buster@qemu-build@x86_64

00:09:06

passed #7645211
debian@cache-container-build@x86_64

00:01:05

passed #7645229
debian:sid@container-build@x86_64

00:01:02

passed #7645235
debian:stretch@container-build@x86_64

00:01:03

 
  Debian Check
passed #7645265
check labels debian@x86_64:buster

00:00:18

passed #7645246
debian:buster@base-image@x86_64

00:00:55

passed #7645255
aarch64
debian:buster@check@aarch64

00:00:19

passed #7645240
debian:buster@check@x86_64

00:00:18

passed #7645258
kvm
debian:buster@qemu-check@x86_64

00:01:28

passed #7645250
debian@cache-check@x86_64

00:00:15

passed #7645271
debian:sid@check@x86_64

00:00:25

passed #7645274
debian:stretch@check@x86_64

00:00:21

passed #7645262
do not rebuild debian:buster@container-build@x86_64

00:00:19

passed #7645268
pull upstream debian:buster@container-build@x86_64

00:00:34