AUM: offline upgrade test between branches

This test ensures that Apertis is capable to upgrade the previos version
to the recent. Check that update manager is able to fix all refs after
successful update.

Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>

test-cases/aum-offline-upgrade-branch.yaml

+metadata:
+  name: aum-offline-upgrade
+  format: "Apertis Test Definition 1.0"
+  image-types:
+    minimal: [ armhf, arm64 ]
+    target:  [ armhf, arm64 ]
+  image-deployment:
+    - OSTree
+  type: functional
+  exec-type: automated
+  priority: critical
+  maintainer: "Apertis Project"
+  description: "Apertis update manager: offline upgrade test between branches.
+    This test ensures that Apertis is capable to upgrade the previos version to the recent.
+    And update manager is able to fix all refs after successful update."
+
+  expected:
+    - "The automated test should succeed."
+
+  notes:
+    - "The test needs network access to the place where OSTree static bundles are hosted, like https://images.apertis.org/"
+
+install:
+  git-repos:
+    - url: https://gitlab.apertis.org/tests/aum-offline-upgrade.git
+      branch: apertis/v2022dev1
+
+run:
+  steps:
+    - "# Enter test directory:"
+    - cd aum-offline-upgrade
+    - "# Execute the following command:"
+    - common/run-test-in-systemd --timeout=900 --name=offline-upgrade env DEBUG=2 RELEASE=$RELEASE ARCH=$ARCH BASEURL=$BASEURL IMGPATH=$IMGPATH IMGDATE=$IMGDATE IMGTYPE=$IMGTYPE IMGNAME=$IMGNAME BOARD=$BOARD ./run-test-offline-upgrade-branch.sh
+
+parse:
+  pattern: ^(?P<test_case_id>[a-zA-Z0-9_\-\./]+):\s*(?P<result>pass|fail|skip|unknown)$