Getting the backend stats does not work

[pieterbos]

https://github.com/newrelic/statsd-infra-backend/blob/master/lib/newrelic-infra.js#L368 will log 'TypeError: Cannot convert undefined or null to object' because Object.keys() is called without an argument

[pieterbos]

Of course this line should be:
Object.keys(nriStats).forEach(function(stat) {

[sbz]

While using the NewRelic StatsD Integration, I have encountered the same problem and I have submitted the following PR #2 to solve it.

[areina]

@pieterbos @sbz this has been solved after merging PR#2.