Log Message:
py-barman: updated to 2.5

Version 2.5:

- Add support for PostgreSQL 11

- Add check-backup command to verify that WAL files required for
   consistency of a base backup are present in the archive. Barman now
   adds a new state (WAITING_FOR_WALS) after completing a base backup,
   and sets it to DONE once it has verified that all WAL files from
   start to the end of the backup exist. This command is included in
   the regular cron maintenance job. Barman now notifies users
   attempting to recover a backup that is in WAITING_FOR_WALS state.

- Allow switch-xlog --archive to work on a standby (just for the
   archive part)

- Bug fixes:
  - Fix decoding errors reading external commands output
  - Fix documentation regarding WAL streaming and backup from
        standby