QE: Fix event history check by shortening event name

[vandabarata]

What does this PR change?

The name of the event in the event history and event summary doesn't exactly match, as the event summary doesn't have "scheduled by (system)". As such, we removed that part of the event check.

Links

Fixes https://github.com/SUSE/spacewalk/issues/22555

• 4.3 https://github.com/SUSE/spacewalk/pull/22556

• DONE

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[Bischoff]

thank you