Cluster: Improve error message when login fails

[johlju]

Details of the scenario you tried and the problem that is occurring:
When line 368 fails it should be more clear in the error message what domain the user, that failed to login, belonged to.
Today only the username is written in the error message, making it difficult to know if the credentials that was passed was correct.

Example error message:

System.InvalidOperationException: Can't logon as user test123.

https://github.com/PowerShell/xFailOverCluster/blob/76f6de5cdba7368753f1a67fc6ca34f735e64bf5/DSCResources/MSFT_xCluster/MSFT_xCluster.psm1#L368-L380

Error string:
https://github.com/PowerShell/xFailOverCluster/blob/76f6de5cdba7368753f1a67fc6ca34f735e64bf5/DSCResources/MSFT_xCluster/en-US/MSFT_xCluster.strings.psd1#L19

The DSC configuration that is using the resource (as detailed as possible):
n/a

Version of the Operating System and PowerShell the DSC Target Node is running:
n/a

Version of the DSC module you're using, or 'dev' if you're using current dev branch:
Dev