All plugins that send only one value have "values" as the dsnames filed.
In this case it is not required to add this field to the nesting of the values field.
It should be removed.
upstream code is incorrect in a number of places, probably because of the initial implementation
implemented as an Output plugin but is actually a Filter plugin - this causes a problem with testing because the fluentd test code is confused about how to set up the test
gemspec is missing development dependencies, which were missing as BuildRequires in the spec file