Added more information and more flexibility to the CA debugging

The ComponentAccumulator.debugMode = True setting was useful yet very crude given the fact that wiht this option configuration runs about 10 times slower. In this MR two things are fixed:

• messages provide better diagnostics
• the debugMode becama a string that control waht is tracked (i.e. trackCA trackPublicTool etc.) That allows a more targetted debugging and thus slow down the configuration only a bit (teste wiht trackCondAlgo on HLT workflow and it is x2 slower).