Test `dirsrvtests/tests/suites/basic/basic_test.py::test_conn_limits` fails in main branch

[vashirov]

Issue Description
Test dirsrvtests/tests/suites/basic/basic_test.py::test_conn_limits fails in main branch:

____________________ ERROR at setup of test_conn_limits[4] _____________________

request = <SubRequest 'dscreate_with_numlistener' for <Function test_conn_limits[4]>>
dscreate_custom_instance = <dirsrvtests.tests.suites.basic.basic_test.CustomSetup object at 0x7f98b8411eb0>

    @pytest.fixture(scope="module", params=set(range(1,5)))
    def dscreate_with_numlistener(request, dscreate_custom_instance):
        numlisteners = request.param
        dscreate_custom_instance.create_wrapper(maxfds=MAX_FDS)
        inst = dscreate_custom_instance.inst
        inst.stop()
        dse_ldif = DSEldif(inst)
        dse_ldif.replace('cn=config', 'nsslapd-numlisteners', str(numlisteners))
>       inst.start()

dirsrvtests/tests/suites/basic/basic_test.py:2395: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/usr/lib/python3.12/site-packages/lib389/__init__.py:177: in inner
    return f(*args, **kwargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <dirsrvtests.tests.suites.basic.basic_test.CustomSetup.CustomDirSrv object at 0x7f98b83c11c0>
timeout = 120, args = ()
tmp_env = environ({'PATH': '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin', 'HOSTNAME': 'server.example.com', 'DI.../root', 'LC_CTYPE': 'C.UTF-8', 'PYTEST_CURRENT_TEST': 'tests/suites/basic/basic_test.py::test_conn_limits[4] (setup)'})
count = 119

    def start(self, timeout=120, *args):
        if self.status():
            return
        tmp_env = os.environ
        # Unset PYTHONPATH to avoid mixing old CLI tools and new lib389
        if "PYTHONPATH" in tmp_env:
            del tmp_env["PYTHONPATH"]
        try:
            subprocess.check_call([
                '/usr/bin/sh',
                self.wrapper
            ], env=tmp_env, stderr=subprocess.STDOUT)
        except subprocess.CalledProcessError as e:
            log.fatal("%s failed!  Error (%s) %s" % (self.wrapper, e.returncode, e.output))
            raise e from None
        for count in range(timeout):
            if self.status():
                return
            time.sleep(1)
>       raise TimeoutException('Failed to start ns-slpad')
E       NameError: name 'TimeoutException' is not defined

dirsrvtests/tests/suites/basic/basic_test.py:131: NameError