run integration tests with simple sample data

examples/answers-raid-lvm.yaml

@@ -18,7 +18,7 @@ Filesystem:
       obj: [disk index 0]
       action: PARTITION
       data:
-        size: 1G
+        size: 0.5G
         fstype: null
     - *newpart
     - *newpart

scripts/runtests.sh

@@ -7,7 +7,7 @@ for answers in examples/answers*.yaml; do
     rm -f .subiquity/subiquity-debug.log
     rm -f .subiquity/run/subiquity/updating
     # The --foreground is important to avoid subiquity getting SIGTTOU-ed.
-    timeout --foreground 60 sh -c "LANG=C.UTF-8 python3 -m subiquity.cmd.tui --answers $answers --dry-run --snaps-from-examples --machine-config examples/mwhudson.json"
+    timeout --foreground 60 sh -c "LANG=C.UTF-8 python3 -m subiquity.cmd.tui --answers $answers --dry-run --snaps-from-examples --machine-config examples/simple.json"
     python3 scripts/validate-yaml.py .subiquity/subiquity-curtin-install.conf
     if grep passw0rd .subiquity/subiquity-debug.log | grep -v "Loaded answers" | grep -v "answers_action"; then
         echo "password leaked into log file"