Adding in lumberjack rules for new json logs

-- also commenting out line about proxy magic for now, in order to run provision command without it blowing up
proxy_magic - remove commented line
Moving lumberjack config to pp:app
Fix puppet syntax

https://github.com/alphagov/pp-puppet/pull/84#discussion_r7221059
Fix more syntax
Lint
Merge pull request #84 from alphagov/logstash_backdrop

Logstash backdrop