Refactor start_clone method and break up powershell functions #14842
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This addresses an issue where an invalid provisioning attempt could fail. Instead of a helpful error message, users are getting an obscure JSON parsing error.
What is essentially happening is that the call to
New-SCVirtualMachine
inside thebuild_ps_script
is failing, with the result that the method returns an empty string because there's no error checking. When JSON then tries to parse an empty string, it bombs.This PR splits the powershell functions into two separate calls, and we check the results of the first one before moving onto the second.
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1441319