Add Statsd Logging for Login Success/Failure

Add Statsd Logging for Login Success/Failure
Also revert the Lua Nginx module to version prior to commit that is causing
random test failures
https://gist.github.com/wkimeria/e4d0686194e71eaefcd6
Merge branch 'master' of https://github.com/wkimeria/ngx_borderpatrol