MuonResonanceTools: const fixes

MuonResonanceSelectionTool::selectMuons calls non-const methods through TooHandles. Make it non-const as well to avoid ToolHandle constness issues. Also need to make MuonResonanceTool::findResonance non-const.

This merge request affects 1 package:

• PhysicsAnalysis/MuonID/MuonPerformanceAnalysis/MuonResonanceTools

added Analysis master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-25381-2019-08-05-23-44
Athena: number of compilation errors 0, warnings 1
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 1823]

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

merged

mentioned in commit 0dce0c80

added sweep:ignore label