Use AtlasFieldCacheCondObj instead of IMagFieldSvc in MuonSegmentMakerTools

Hi,

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

Best, Nico

MuonSpectrometer/MuonConfig/python/MuonTrackBuildingConfig.py

@@ -185,9 +185,9 @@ def MuonSegmentMatchingToolCfg(flags, name="MuonSegmentMatchingTool", **kwargs):
     
     kwargs.setdefault( "doThetaMatching", flags.Muon.useSegmentMatching)
     kwargs.setdefault( "doPhiMatching", False )
-    kwargs.setdefault( "ToroidOn", True ) # Was "not jobproperties.BField.allToroidOn()" but do not have access to Field here.
     if flags.Beam.Type == 'cosmics':
         kwargs.setdefault("OverlapMatchAveragePhiHitPullCut",  200.)
+        kwargs.setdefault( "ToroidOn", False ) # Was "not jobproperties.BField.allToroidOn()" but do not have access to Field here.
 
     # There are two tools which this depends on which aren't properties and which weren't defined in old configuration
     # Ignore for now, but FIXME one day
@@ -195,6 +195,7 @@ def MuonSegmentMatchingToolCfg(flags, name="MuonSegmentMatchingTool", **kwargs):
     # m_pairMatchingTool("Muon::MuonSegmentPairMatchingTool/MuonSegmentPairMatchingTool"),
     # Also, residual pull calculator not yet configured. #FIXME
     
+    result = ComponentAccumulator()
     matching = Muon__MuonSegmentMatchingTool(name, **kwargs)
     result.setPrivateTools(matching)
     return result