By default the Google builder will wrap any provided startup script file
in order to track its execution via custom metadata. The wrapper script
can add a bit of complexity to the start script file so a new option is
being added `wrap_startup_script`. This option allows a user to disable
the script wrapping and just let GCE do its own thing when executing a
startup script.
Megan Marsh
Wilken Rivera
Matthew Hooker
Scott Crunkleton