[COOK-2927] - http_realip_module support for real_ip_recursive

* add support for real_ip_recursive directive in nginx::http_realip_module
Merge pull request #110 from rjocoleman/COOK-2927

[COOK-2927] - http_realip_module support for real_ip_recursive
wip. rate limiting
[COOK-3080] - update readme, fix whitespace in template
Merge branch 'COOK-3080'
Fix runner initialization to mock proper platforms