InDetBeamSpotService: Properly configure Beampos folder.

Include the className= argument in addFolder calls for Beampos.
Fixes test failures in AthenaPoolTest in master.

InnerDetector/InDetConditions/InDetBeamSpotService/share/BeamCondSvc.py

@@ -6,12 +6,12 @@ try:
     from RecExConfig.RecFlags import rec
     # If express processing, point beam spot to online folder results
     if(rec.doExpressProcessing()):
-        conddb.addFolder('INDET_ONL','/Indet/Onl/Beampos <key>/Indet/Beampos</key>')
+        conddb.addFolder('INDET_ONL','/Indet/Onl/Beampos <key>/Indet/Beampos</key>', className='AthenaAttributeList')
     else:
-        conddb.addFolderSplitOnline("INDET","/Indet/Onl/Beampos","/Indet/Beampos")
+        conddb.addFolderSplitOnline("INDET","/Indet/Onl/Beampos","/Indet/Beampos", className='AthenaAttributeList')
 except ImportError:
     # Protection for AthSimulationBase release which does not contain RecExConfig
-    conddb.addFolderSplitOnline("INDET","/Indet/Onl/Beampos","/Indet/Beampos")
+    conddb.addFolderSplitOnline("INDET","/Indet/Onl/Beampos","/Indet/Beampos", className='AthenaAttributeList')
 
 
 #Code to help transition to MT system, remove once this package is removed