Enable Contracts for Java by default for test targets.
Enable Contracts for Java by default for test targets.

Contracts remain disabled for non-test build targets. To enable for
non-test targets, run with -Duse.contracts=true. To disable for test
targets, run with -Duse.contracts=false.

iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable