Support java_args being specified by both a string and an array.
Support java_args being specified by both a string and an array.

This patch restores support for arrays that was lost after change 4e24616239d8c455f51e1b2058c3e83060731511

apache/buildr,stewi2/buildr,apache/buildr,apache/buildr,apache/buildr,stewi2/buildr,stewi2/buildr,stewi2/buildr