Starting with version 5.4.0, Cordova now outputs "Picked up _JAVA_OPTIONS: -Xmx512M" to stderr. This breaks clients such as Visual Studio because we interpret messages in stderr to be errors, and this is not an error. So the result is that we show deploy failures to the dev when there are no errors.
See this for customer impact: http://stackoverflow.com/questions/33603167/vs2015-build-with-cordova-cli5-4-0-shows-deployment-errors
We can work around this in Visual Studio by using special casing, but Cordova needs to output this in stdout like it did in previous versions