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>
14 jobs for master in 10 minutes and 9 seconds (queued for 3 seconds)
Child pipeline (parent)
Status Job ID Name Coverage
  Fedora Container Build
passed fedora:32@container-build@x86_64 #7645238

00:02:12

passed fedora:33@container-build@aarch64 #7645227
aarch64

00:02:07

passed fedora:33@container-build@x86_64 #7645216

00:01:46

passed fedora:33@qemu-build@x86_64 #7645233
kvm

00:08:17

passed fedora@cache-container-build@x86_64 #7645220

00:01:51

 
  Fedora Check
passed check labels fedora@x86_64:33 #7645266

00:00:19

passed do not rebuild fedora:33@container-build@x86_64 #7645263

00:00:23

passed fedora:32@check@x86_64 #7645272

00:00:13

passed fedora:33@base-image@x86_64 #7645248

00:01:25

passed fedora:33@check@aarch64 #7645257
aarch64

00:00:34

passed fedora:33@check@x86_64 #7645244

00:00:16

passed fedora:33@qemu-check@x86_64 #7645260
kvm

00:01:51

passed fedora@cache-check@x86_64 #7645254

00:00:09

passed pull upstream fedora:33@container-build@x86_64 #7645269

00:00:21