Fix MuonIdHelperTool initialisation for ATLASSIM-4263

Hi, this MR should fix https://its.cern.ch/jira/browse/ATLASSIM-4263 by letting MuonIdHelperTool decide to not use CSC/MM/sTGC if the corresponding helpers cannot be found. Also a WARNING message is printed that users should steer this behaviour via the properties of the MuonIdHelperTool in the future to get rid of the WARNING. Adding @jchapman who might be interested in this. Best, Nico

This merge request affects 1 package:

• MuonSpectrometer/MuonIdHelpers

Adding @rosati ,@wleight as watchers

added 21.3 MuonSpectrometer review-pending-level-1 labels

added 1 commit

• 780dcdc7 - this fixes ATLASSIM-4266

Compare with previous version

now also fixing https://its.cern.ch/jira/browse/ATLASSIM-4266

This merge request affects 2 packages:

• MuonSpectrometer/MuonIdHelpers
• Simulation/G4Atlas/G4AtlasTests

Adding @jchapman ,@rosati ,@vpascuzz ,@wleight as watchers

added Simulation label

added review-approved label

removed review-pending-level-1 label

merged

mentioned in commit ce82a58d

Thanks @nkoehler. The changes look good to me, so merging to allow the changes to be seen in the next nightly.

CI Result SUCCESS

	Athena
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-25410-2019-08-07-00-02
Athena: number of compilation errors 0, warnings 163
For experts only: Jenkins output [CI-MERGE-REQUEST 40221]

CI Result SUCCESS

	Athena
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-25410-2019-08-07-00-04
Athena: number of compilation errors 0, warnings 163
For experts only: Jenkins output [CI-MERGE-REQUEST 40222]

added sweep:ignore label

mentioned in merge request !26017 (merged)

mentioned in commit e5917b77

mentioned in merge request !26610 (merged)

added master sweep:done labels and removed sweep:ignore label

added 1 deleted label and removed master label

Manually swept to master in !26610 (merged).