Add support for spaces in histogram variables (ATLASDQ-750)

When histograms are declared with spaces in variable list (e.g. "eta, phi") the code used space as a part of variable name which failed to match monitored variables. Fixed by stripping spaces after splitting on commas. Added test case for that. Logging messages for unmatched variables were promoted from DEBUG to WARNING.

Closes ATLASDQ-750

added DQ label

added 76 commits

• 227c80c6...47c92f5d - 75 commits from branch atlas:master
• 75403918 - Add support for spaces in histogram variables.

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This merge request affects 1 package:

• Control/AthenaMonitoringKernel

Adding @ssnyder as watcher

added Core master review-pending-level-1 labels

CI Result SUCCESS (hash 75403918)

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

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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 8982]

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Pavol [as L2 MR shifter]

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merged

mentioned in commit 6436933c

added sweep:ignore label

mentioned in merge request !29772 (merged)