avocado.plugins.test_list: Clean up view after error

Make sure the paginator is cleaned up after displaying
an error.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

avocado/plugins/test_list.py

@@ -78,6 +78,7 @@ class TestList(plugin.Plugin):
         if error_msg_parts:
             for error_msg in error_msg_parts:
                 self.view.notify(event='error', msg=error_msg)
+            self.view.cleanup()
             sys.exit(exit_codes.AVOCADO_FAIL)
 
         test_matrix = []