/usr/share/java/lucene3-pruning.jar is in liblucene3-contrib-java 3.6.2+dfsg-8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/java/lucene3-pruning-3.6.2.jar
/usr/share/java/lucene3-pruning-3.6.2.jar