Update the way used to detect a machine is ready in google #152
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On GCE arm servers is not allowed to write to /dev/ttyS* This implemerntation writes to console the Marker so it can be retrieved by the serialPort API This change has been validated for intel and arm and all the supported systems and it works well.
Some systems don't support /dev/ttyS0 (arm systems) In case /dev/ttyS0 fails to write, the marker is written in /dev/console
This works in all the systems
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On ARM servers it is not allowed to write to /dev/ttyS*, so the startup script fails to complete.
This implemerntation writes to console the Marker so it can be retrieved
by the serialPort API
This change has been validated for intel and arm and all the supported
systems and it works well.