chore: bump tests/mender-image-tests from `22f9b97` to `a9be0d2`

Bumps [tests/mender-image-tests](https://github.com/mendersoftware/mender-image-tests) from `22f9b97` to `a9be0d2`.
- [Release notes](https://github.com/mendersoftware/mender-image-tests/releases)
- [Commits](22f9b97395...a9be0d22934c3883abbf288797adec815bad5404)

---
updated-dependencies:
- dependency-name: tests/mender-image-tests
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Lluis Campos <lluis.campos@northern.tech>

tests/mender-image-tests

@@ -1 +1 @@
-Subproject commit 22f9b97395cfec460d2ee9e7016342bb41fda389
+Subproject commit a9be0d22934c3883abbf288797adec815bad5404

tests/requirements_py3.txt

@@ -21,6 +21,7 @@ pytest-html==3.1.1
 pytest-metadata==2.0.2
 python-lzo==1.14
 PyYAML==6.0
+redo==2.0.4
 requests==2.28.1
 six==1.16.0
 toml==0.10.2