Revert "updated javasrc to point to new version of Mallet"

This reverts commit b153b1845545755de2ca79dec0105e6352f18a1f.
Revert "pull from upstream"

This reverts commit fb78937cf06214a5a17a1001f683af71f9a3262e, reversing
changes made to 2420a9f470d0afc6df46338073894f6f7323c030.