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Note on CHARON instance service:
The 'expectopa0' mode will perform the "power off" command itself or will send the "F6" key if this command is not available, thus stopping the service. The other modes will perform a clean shutdown without powering off the CHARON instance, thus leaving the service active and the instance at the SRM prompt. To recognize the completion of the shutdown process in this case, a loop has been introduced to check if the guest operating system running on the instance responds to "ping". Once it no longer responds, the script waits for a specified amount of time (waitbeforestop parameter) before stopping the service.
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