LArMonitoring: Don't make duplicate histograms.
LArRODMonAlg and LArRODMonTool try to configure the same histograms. If we run them in the same job, this can lead to THistSvc crashing with a double-delete in finalize. Fix to avoid configuring LArRODMonTool if the algorithm is requested.
Fixes crash with q220 with --thread=1.