https://github.com/request/request/issues/2091
https://stackoverflowfeeds.blogspot.co.uk/2017/05/solved-hpeunexpectedcontentlength-error.html
I then decide to update to the latest version(node-v8.1.3) and it appeared that this was still an issue. Although, I wrote a simple client that does the http request, as per postman test, and that worked fine! I then decided to downgrade nodejs to v5.0.0 as per the previous links and that seems fine! Not sure if this is a nodejs and newman integration or not???