[PATCH v2] Acceptance Tests: add standard clean up at test tearDown()

[Willian Rampazzo <willianr@redhat.com>]

From: Cleber Rosa <crosa@redhat.com>

The avocado.Test class, used as the basis of the avocado_qemu.Test
class, performs a clean of temporary directories up as part of its own
tearDown() implementation.

But the avocado_qemu.Test class is currently missing the same clean
up, as it implemented its own tearDown() method without resorting to
the upper class behavior.

This brings avocado_qemu.Test behavior in sync with the standard
avocado.Test behavior and prevents temporary directories from
cluttering the test results directory (unless instructed to do so with
Avocado's "--keep-tmp" option).

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Cleber Rosa <crosa@redhat.com>
[willianr: respin to new Python super format]
Signed-off-by: Willian Rampazzo <willianr@redhat.com>

---
v2
  - adjust super call to conform with PEP3135
---
 tests/acceptance/avocado_qemu/__init__.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/acceptance/avocado_qemu/__init__.py b/tests/acceptance/avocado_qemu/__init__.py
index 2c4fef3e14..d9e1b32aa1 100644
--- a/tests/acceptance/avocado_qemu/__init__.py
+++ b/tests/acceptance/avocado_qemu/__init__.py
@@ -276,6 +276,7 @@ def tearDown(self):
         for vm in self._vms.values():
             vm.shutdown()
         self._sd = None
+        super().tearDown()
 
     def fetch_asset(self, name,
                     asset_hash=None, algorithm=None,
-- 
2.31.1