tests/avocado: Rename avocado_qemu.Test -> QemuSystemTest

To run user-mode emulation tests, we introduced the
avocado_qemu.QemuUserTest which inherits from avocado_qemu.QemuBaseTest.
System-mode emulation tests are based on the avocado_qemu.Test class,
which also inherits avocado_qemu.QemuBaseTest. To avoid confusion,
rename it as avocado_qemu.QemuSystemTest.

Suggested-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211105143416.148332-7-f4bug@amsat.org>
diff --git a/tests/avocado/virtio_check_params.py b/tests/avocado/virtio_check_params.py
index 87e6c83..e869690 100644
--- a/tests/avocado/virtio_check_params.py
+++ b/tests/avocado/virtio_check_params.py
@@ -24,7 +24,7 @@
 
 sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'python'))
 from qemu.machine import QEMUMachine
-from avocado_qemu import Test
+from avocado_qemu import QemuSystemTest
 from avocado import skip
 
 #list of machine types and virtqueue properties to test
@@ -41,7 +41,7 @@
                                     'driver=null-co,id=drive0,if=none']}
 
 
-class VirtioMaxSegSettingsCheck(Test):
+class VirtioMaxSegSettingsCheck(QemuSystemTest):
     @staticmethod
     def make_pattern(props):
         pattern_items = ['{0} = \w+'.format(prop) for prop in props]