Make sure that cronfiles are also filtered with expandproperties if run under sudo

We noticed that cronfiles copied using the sudo method were not replace (which is rather logical).

This way they are first copied to a temporary directory in order to replace the variables in the files, then copied from there to the cron directory under sudo user.

@ngroot :)
The deployed version should be unaware of any deployment tool at ALL! Hence the usage of tools like phing, capistrano and such to set environment variables. The same counts for these files. I really don't see any argument for your consideration that you're not a big fan of editing files in the deployed version.

@nickbelhomme @david4worx what are your opinions?