Refactor parsing puppetscript

[chrisma]

• Investigate if there is a Ruby lib for parsing puppetscripts
• Parse using regexes with context information in capture groups
• Don't rely on the line number of scripts
• Get rid of node_file_correct?
• What happens if only a single pp file is broken? Does the entire system go down?

[chrisma]

We could make this more generic by relying solely on a regex to extract the user names, regardless of which line they are in, similar to \$admins\s*=\s*\[["|'](\S+)["|']\] , see: https://rubular.com/r/4AJ5PUkYflmzcK