Bug#503837: liblog4j1.2-java: missing org.apache.log4j.jmx package

[Ludovic Claude]

log4j JMX implementation depends on the
com.sun.jdmk.comm.HtmlAdaptorServer class which can be found in OpenMDK
(https://opendmk.dev.java.net/). This project is mostly open source
(dual GPL2/CDDL license) except some binary blobs which, if removed, may
limit only some parts of the functionality - hopefully not what's
interesting us.

Ludovic