Sweeping !23970 from master to 21.3. Add ImportError to check_log patterns

Add ImportError to check_log patterns

See merge request !23970 (merged)

added sweep:from master label

Adding original author @rbielski as watcher.

restored source branch cherry-pick-bddec6037c-21.3

This merge request affects 1 package:

• Trigger/TrigValidation/TrigValTools

Adding @hartj ,@rbielski as watchers

added 21.3 Trigger review-pending-level-1 labels

CI Result SUCCESS

	Athena
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-24028-2019-06-07-04-57
Athena: number of compilation errors 0, warnings 13
For experts only: Jenkins output [CI-MERGE-REQUEST 39487]

It seems ok: approved Baida L1

added review-approved label and removed review-pending-level-1 label

mentioned in commit fd51fbaa

merged

added sweep:ignore label