Description

This iteration of improvment

• Resolve VHD file path and only use that
• refactor validateVHD to getVDSLength
• covertVHD() and resizeVHD() functions return new filepaths
• if upload fails, clean up resource and return terminating error
• check OS at the beginning of resizeVHD() and convertVHD()
• add warnings at the beginning of resizeVHD() and convertVHD()

Future iteration

• option to skip MD5 hasing
• resize on the fly
• convert VHDX to VHD on the fly

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• The appropriate ChangeLog.md file(s) has been updated:
  • For any service, the ChangeLog.md file can be found at src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md
  • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header -- no new version header should be added
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
• For public API changes to cmdlets:
  • a cmdlet design review was approved for the changes in this repository (Microsoft internal only)
    • {Please put the link here}
  • the markdown help files have been regenerated using the commands listed here