xVMHyperV: Wrong localized string is used to throw error messages.

[johlju]

Details of the scenario you tried and the problem that is occurring:
This was reported in PR #148 by @Geogboe.

AutomaticCheckpointsUnsupportedError on line 740 does not resolve to a defined localized data variable and it looks like it should be AutomaticCheckpointsUnsupported instead. Without this change a meaningless error message is produced: ScriptHalted instead of what is should be: AutomaticCheckpoints are not supported on this host."

I think we should change the line 15 to 'AutomaticCheckpointsUnsupportedError' instead (the localized string is used at two locations).

https://github.com/PowerShell/xHyper-V/blob/834dec27c114783ed56b5f430f96fe1d1d6ea4e5/DSCResources/MSFT_xVMHyperV/MSFT_xVMHyperV.psm1#L15

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