Fix maven build problem.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1588059 13f79535-47bb-0310-9956-ffa450edef68
Upgrade LMAX disruptor to 3.2.1.

git-svn-id: https://svn.apache.org/repos/asf/logging/log4j/log4j2/trunk@1588061 13f79535-47bb-0310-9956-ffa450edef68