Make the Ant test targets work: Added forkmode=once to avoid test accessing the same files in parallel.
Make the Ant test targets work: Added forkmode=once to avoid test accessing the same files in parallel.

netarchivesuite/netarchivesuite-svngit-migration,netarchivesuite/netarchivesuite-svngit-migration,netarchivesuite/netarchivesuite-svngit-migration,netarchivesuite/netarchivesuite-svngit-migration,netarchivesuite/netarchivesuite-svngit-migration,netarchivesuite/netarchivesuite-svngit-migration