This is in preparation to remove the ROOTCORE macro definition from the
analysis release builds.

Conflicts:
	Control/AthToolSupport/AsgTools/AsgTools/AnaToolHandle.icc
	Control/AthToolSupport/AsgTools/test/gt_AsgTool.cxx
	Control/AthToolSupport/AsgTools/test/gt_MessageCheck.cxx
	Control/AthToolSupport/AsgTools/test/gt_TProperty.cxx
	Control/AthToolSupport/AsgTools/test/gt_UnitTest_test.cxx