Handle concurrent load of file archives properly.

Kai Reinhard

30.02.2018 0703e4eeef5bc069b744eb7a9f63449fb8524766

 borgbutler-core/src/main/java/de/micromata/borgbutler/BorgJob.java

@@ -17,10 +17,12 @@
 * A queue is important because Borg doesn't support parallel calls for one repository.
 * For each repository one single queue is allocated.
 */
public class BorgJob extends AbstractCommandLineJob<String> {
public class BorgJob<T> extends AbstractCommandLineJob<String> {
    private Logger log = LoggerFactory.getLogger(BorgJob.class);
    @Getter
    private BorgCommand command;
    @Getter
    protected T payload;

    public BorgJob(BorgCommand command) {
        this.command = command;