The varargs `LOG.debug was added in slf4j-api 1.7. It looks like we're pulling in 1.7.2 from jclouds and 1.6.6 from core brooklyn. Let's leave the code as using `new Object[] {...}` rather than varargs until we bump the slf4j-api version. Just now, it's probably unpredictable whether it will be 1.7.x or 1.6.x on the classpath! We'll fix that separately.