Use AtlasFieldCacheCondObj instead of IMagFieldSvc in MuonSegmentMakerTools

Nicolas Koehlerrequested to merge
nkoehler/athena:rec5469 into master

Hi,

this MR moves from using IMagFieldSvc towards using the thread-safe AtlasFieldCacheCondObj in MuonSegmentMakerTools. It fixes ATLASRECTS-5469.

Best, Nico

Merge request reports