prior version script run.
current version script run.
Check output are the same and it is.
```
$ python ./export-archive_counters.py > test.origin.json
$ python ./export_archive_counters.py --history-data-file ./history-counters.munin.json > test.json
$ stat test.json
File: test.json
Size: 85468 Blocks: 168 IO Block: 4096 regular file
Device: fe02h/65026d Inode: 43916075 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 1000/ tony) Gid: ( 1000/ tony)
Access: 2019-08-10 23:32:28.555767531 +0200
Modify: 2019-08-10 23:31:41.050503170 +0200
Change: 2019-08-10 23:31:41.050503170 +0200
Birth: -
$ diff test.json test.origin.json # <- no diff
$ sha512sum test.json
147670ea7b4d8d388adfcf09586e5c143113d26f6eee265ba2d0b88185b3809b6429668c3ba96a46829a68149a2355ff069e8018935eebc2ebd923069e2f17bb test.json
$ sha512sum test.original.json
sha512sum: test.original.json: No such file or directory
$ sha512sum test.origin.json
147670ea7b4d8d388adfcf09586e5c143113d26f6eee265ba2d0b88185b3809b6429668c3ba96a46829a68149a2355ff069e8018935eebc2ebd923069e2f17bb test.origin.json
```