Domain name label with randomness for New-AzureRMVM and VMSS.

[sergey-shandar]

Description

Domain name randomness.

• Note: Before merging we need to fix VMSS output to print generated domain name.

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[twitchax]

LGTM.

[twitchax]

Instead of != true, just throw a ! out front?

[sergey-shandar]

This is bool? so I would like to have explicit syntax.

[sergey-shandar]

Ready for review.

[markcowl]

Please file an issue to add domain name label validation to existing VM tests

[markcowl]

on demand run here: https://azuresdkci.westus2.cloudapp.azure.com/view/PowerShell/job/powershell-demand/423/

[markcowl]

The test for simple vm parameter set is failing in the on-demand runbecause it needs to be re-recorded.

Also, please mark this as a check-in test

[sergey-shandar]

#5451

[markcowl]

on demand run here: https://azuresdkci.westus2.cloudapp.azure.com/view/PowerShell/job/powershell-demand/431/

[markcowl]

on demand run here: https://azuresdkci.westus2.cloudapp.azure.com/view/PowerShell/job/powershell-demand/440/