static Thread safety fixes for xAODMuon

Thread safety fixes (warnings from the compile time checker) for xAODMuon . More or less trivial ones i.e static --> static const.

changed the description

Jenkins please retry a build

This merge request affects 1 package:

• Event/xAOD/xAODMuon

Adding @rbianchi as watcher

added EDM master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-20703-2019-01-29-13-01
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
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Seems clear, adding const, so approving.

Pavol [as L2 MR shifter]

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

mentioned in commit 7b38e42b

merged

added sweep:ignore label