Track requirement for supporting OpenBSD

[CraigWiand]

Today we err:

Field	Message
sessionId	a67d9f8b-8d2d-4cbb-948a-469bd589c1a9
outerType	FileNotFoundError
outerMessage	[Errno 2] No such file or directory: '/etc/azdis/openbsd/normal'

Call stack

  | 0 | {"method":"execute","assembly":"Unknown","level":2,"line":254,"fileName":"/azureDiskInspectSvc/GuestFishWrapper.py"}
  | 1 | {"method":"start","assembly":"Unknown","level":1,"line":51,"fileName":"/azureDiskInspectSvc/GuestFishWrapper.py"}
  | 2 | {"method":"do_POST","assembly":"Unknown","level":0,"line":338,"fileName":"/azureDiskInspectSvc/AzureDiskInspectService.py"}