Debug network issue of case test_vdc_virtual_subscription_on_webui

[Junefen]

The testcase test_vdc_virtual_subscription_on_webui always failed in the automation workflow, but could be passed in the local debug, so guess it should be the network issue.
Add 5 seconds wait and run the sub-man refresh before checking the subscription.

Test Result

% python3 -m pytest -v tests/subscription/test_satellite.py -k 'test_vdc_virtual_subscription_on_webui'
========================================================= test session starts =========================================================
platform darwin -- Python 3.11.2, pytest-7.2.2, pluggy-1.0.0 -- /opt/homebrew/opt/[email protected]/bin/python3.11
cachedir: .pytest_cache
rootdir: /Users/yuefliu/workspace/virtwho-test, configfile: pytest.ini
collected 11 items / 10 deselected / 1 selected                                                                                       

tests/subscription/test_satellite.py::TestSatelliteScaDisable::test_vdc_virtual_subscription_on_webui PASSED                    [100%]

====================================== 1 passed, 10 deselected, 2 warnings in 176.86s (0:02:56) =======================================
[2024-01-26 14:58:52] - [conftest.py] - INFO: Finished Test: tests/subscription/test_satellite.py::TestSatelliteScaDisable::test_vdc_virtual_subscription_on_webui

[Junefen]

Will merge it by myself to rerun the Jenkins job.