Add target to create a jgroups-sources.jar in dist directory for JGRP-819.
Add target to create a jgroups-sources.jar in dist directory for JGRP-819.

kedzie/JGroups,Sanne/JGroups,TarantulaTechnology/JGroups,ligzy/JGroups,slaskawi/JGroups,kedzie/JGroups,ibrahimshbat/JGroups,belaban/JGroups,pferraro/JGroups,dimbleby/JGroups,danberindei/JGroups,deepnarsay/JGroups,pruivo/JGroups,pruivo/JGroups,rhusar/JGroups,pferraro/JGroups,pruivo/JGroups,rvansa/JGroups,tristantarrant/JGroups,kedzie/JGroups,rpelisse/JGroups,slaskawi/JGroups,danberindei/JGroups,Sanne/JGroups,tristantarrant/JGroups,ligzy/JGroups,deepnarsay/JGroups,vjuranek/JGroups,TarantulaTechnology/JGroups,vjuranek/JGroups,rhusar/JGroups,rhusar/JGroups,rpelisse/JGroups,slaskawi/JGroups,ibrahimshbat/JGroups,rpelisse/JGroups,deepnarsay/JGroups,dimbleby/JGroups,belaban/JGroups,ibrahimshbat/JGroups,ibrahimshbat/JGroups,pferraro/JGroups,Sanne/JGroups,danberindei/JGroups,belaban/JGroups,ligzy/JGroups,TarantulaTechnology/JGroups,vjuranek/JGroups,rvansa/JGroups,dimbleby/JGroups