test_service_scenario.py test fails with syntax error

I'm currently packaging `azdev` for openSUSE Tumbleweed:

See: https://build.opensuse.org/package/show/home:glaubitz:branches:Cloud:Tools/azdev

The testsuite currently fails in `test_service_scenario.py` with a syntax error, even on Python 3.8 (since Python 3.9 and 3.10 are not recommended):

```
[ 9s] + pytest-3.8 --ignore=_build. --ignore=_build.python38 -v
[ 9s] ============================= test session starts ==============================
[ 9s] platform linux -- Python 3.8.12, pytest-6.2.5, py-1.11.0, pluggy-1.0.0 -- /usr/bin/python3.8
[ 9s] cachedir: .pytest_cache
[ 9s] rootdir: /home/abuild/rpmbuild/BUILD/azdev-0.1.36
[ 9s] plugins: xdist-2.5.0, forked-1.3.0
[ 9s] collecting ... collected 0 items / 1 error
[ 9s]
[ 9s] ==================================== ERRORS ====================================
[ 9s] ________ ERROR collecting azdev/mod_templates/test_service_scenario.py _________
[ 9s] /usr/lib/python3.8/site-packages/_pytest/python.py:578: in _importtestmodule
[ 9s] mod = import_path(self.fspath, mode=importmode)
[ 9s] /usr/lib/python3.8/site-packages/_pytest/pathlib.py:524: in import_path
[ 9s] importlib.import_module(module_name)
[ 9s] /usr/lib64/python3.8/importlib/__init__.py:127: in import_module
[ 9s] return _bootstrap._gcd_import(name[level:], package, level)
[ 9s] :1014: in _gcd_import
[ 9s] ???
[ 9s] :991: in _find_and_load
[ 9s] ???
[ 9s] :975: in _find_and_load_unlocked
[ 9s] ???
[ 9s] :671: in _load_unlocked
[ 9s] ???
[ 9s] /usr/lib/python3.8/site-packages/_pytest/assertion/rewrite.py:161: in exec_module
[ 9s] source_stat, co = _rewrite_test(fn, self.config)
[ 9s] /usr/lib/python3.8/site-packages/_pytest/assertion/rewrite.py:362: in _rewrite_test
[ 9s] tree = ast.parse(source, filename=fn_)
[ 9s] /usr/lib64/python3.8/ast.py:47: in parse
[ 9s] return compile(source, filename, mode, flags,
[ 9s] E File "/home/abuild/rpmbuild/BUILD/azdev-0.1.36/azdev/mod_templates/test_service_scenario.py", line 16
[ 9s] E class {{ name.capitalize() }}ScenarioTest(ScenarioTest):
[ 9s] E ^
[ 9s] E SyntaxError: invalid syntax
[ 9s] =========================== short test summary info ============================
[ 9s] ERROR azdev/mod_templates/test_service_scenario.py
[ 9s] !!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
[ 9s] =============================== 1 error in 0.16s ===============================
```

Inizia da azdev/mod_templates/test_service_scenario.py e verifica come vengono gestiti i file sotto azdev/mod_templates durante la raccolta dei test pytest. Riproduci il problema con il comando di test Python 3.8 indicato, quindi verifica che la raccolta dei test venga completata senza l’errore di sintassi e che il comportamento del template continui a essere coperto dai test.

Scritto dal modello di indicizzazione a partire dal testo della issue.