Add HLTMPPU Child Issue to check_log patterns

This pattern will help to catch the case when HLTMPPU child crashes but there's no other error message and the mother process exits with zero. The error message to catch in this case is:

2019-Aug-05 18:53:21,016 WARNING [HLTMPPU::doNannyWork(...) at /builds/atlas-tdaq-software/tdaq-cmake/HLTMPPU/src/HLTMPPU.cxx:1198] Child Issue: "Child pid=9991 exited with signal 9".

Adding this to both the perl and the python check_log version.

cc @dzanzi, @salderwe, @smh

This merge request affects 1 package:

• Trigger/TrigValidation/TrigValTools

Adding @hartj ,@jpanduro as watchers

added Trigger master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-25393-2019-08-06-01-55
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 1836]

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

mentioned in commit 8e654020

merged

added sweep:ignore label