"not adding..." warnings in log4j 1.2.15 jar build

[apjanke]

In what I think is the mvn2 assembly:assembly step for log4j 1.2.15:

[INFO] Building jar: /Users/janke/repos/slf4m-jankalog/src/opp/opp-munged/log4j-1.2.15/target/log4j-1.2.15-janklab.1-javadoc.jar
[INFO] Preparing source:jar
[WARNING] Removing: jar from forked lifecycle, to prevent recursive invocation.
[INFO] No goals needed for project - skipping
[INFO] [source:jar {execution: default}]
[WARNING] NOT adding sources to artifacts with classifier as Maven only supports one classifier per artifact. Current artifact [net.janklab.opp.log4j:log4j:jar:tests:1.2.15-janklab.1] has a [tests] classifier.

Figure those out.