Assigning an ID to a backup

Use the --backupID argument to assign an ID to a backup.

Steps

To back up the userRoot directory, run the following command.
```
$ bin/backup --backupDirectory  </path/to/backups/>userRoot \
  --backendID userRoot --backupID weekly
```
The --backupID argument identifies the backup being created as "weekly".

Result:

The backup file appears under backups/userRoot directory as userRoot-backup-weekly.