The RingBufferLogEvent should track a ThrowableProxy instead of a Throwable. This relates to the application listening side of Log4j events from a JSON or XML source (another app in another JVM).

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1593598 13f79535-47bb-0310-9956-ffa450edef68