@Override
      public long currentTime() {
        return System.currentTimeMillis() - 2 * 24 * 3600 * 1000;
      }
Verify that full backup is created on a single table with data correctly. Verify that history
works as expected.
@throws Exception if doing the backup or an operation on the tables fails
hbase-backup/src/test/java/org/apache/hadoop/hbase/backup/TestBackupDelete.java