Fix run tests in systemd

After moving tests to test group, the steps were updated. However, while
doing that an error was introduced and the script was not found. When
using common/run-test-in-systemd the path to the script needs to be
included, to allow the script to run. This fixes errors like

boot-no-crashes/common/tee-exec: 19: boot-no-crashes.sh: not found

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

test-cases/boot-no-crashes.yaml

@@ -29,4 +29,4 @@ run:
     - "# Enter test directory:"
     - cd boot-no-crashes
     - "# Execute the following command:"
-    - common/run-test-in-systemd --name=run-test boot-no-crashes.sh
\ No newline at end of file
+    - common/run-test-in-systemd --name=run-test ./boot-no-crashes.sh
\ No newline at end of file

test-cases/disk-rootfs-fsck.yaml

@@ -28,5 +28,5 @@ run:
     - "# Enter test directory:"
     - cd sanity
     - "# Execute the following command:"
-    - common/run-test-in-systemd --name=as-root fsck-boot-rootfs.sh
+    - common/run-test-in-systemd --name=as-root ./fsck-boot-rootfs.sh