[BUGFIX] fix scheduler task logging in case of an Exception

correctly Log the Message if a Schduler Task throws an Exception,
also the Exception code ins now Part of the Logged Message.

Resolves: #80566
Releases: master, 7.6
Change-Id: I177a52c17d5f40ce0a25418721d47ea9daa21881
Reviewed-on: https://review.typo3.org/52279


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Thomas Hohn <thomas@hohn.dk>
Tested-by: Thomas Hohn <thomas@hohn.dk>
Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>