REST API issue

[moodcheerful]

A REST call to /adagios/rest/pynag/json/verify_configuration returns a JSON response that doesn't show errors count correctly.

The "errors" field shows the empty string whereas the "output" field shows that there are errors in the configuration.

Config with errors: http://pastebin.com/raw/xtBxtWH6 Config with no errors: http://pastebin.com/raw/dCz3ssg8