Code review comment for lp:~andreserl/maas/trunk-fpi

So based on the conversation I just had with Andres he explained that the FPI script stuff here is also going to be used on the CD installer so they wanted to share the code.

The maas-make-userdata script is used to generate a template, and the intention is that in the future people should be able to pass extra scripts to run in preinst and postinst time in the installer.

I am strongly of the opinion that that template should be static in MAAS and any data that it requires comes from MAAS (it does now anyway - it's just indirect!). MAAS's templating system will handle this requirement with ease and vastly reduce this complexity. It is fragile and will be very very hard to debug problems.