Shell scripts tests are intermittently failing on Windows CI runs

The script tests seem to be intermittently failing on Windows.

The AddUserTestCase and CliScriptTestCase seem to only be failing with PowerShell and are timing out. The StandaloneScriptTestCase and DomainScriptTestCase seem to have an issue where the management address and port are already in use.

On all tests we should increase the timeout as it may be too low which is leading to the other issues. Though we need to test this to confirm it.

For the standalone and domain tests it may be wise to introduce a pre-check looking for a running server and shutdown that server if it's running.