Improve error logging of core:archive cron script

[mattab]

Currently the way the Auto archiving script logs errors is not ideal.

The goal of this ticket is to make sure that Error logging to stderr, of the ./console core:archive script, will log an easy to parse and readable error log.

[mattab]

In 396558a: Refs #5111 Refactor Logger to write error messages to stderr, and to screen.

[mattab]

In 1f0de61: Fixes #5111 CronArchive now logs errors in an easy to parse format, on the std error output, each error on one line.