this MR is going to prepare the next round of recommendations for the reconstruction, TTVA and isolation scale-factors. The tool will be augmented with the following features
*** Break down of the systematics per source (I.e. truth-closure/ fit-template/ isolation WP/ etc. *** Decorrelation of the systematics per bin as it's already done for the statistical error if it's possible *** Cleaning up depreciated classes *** Minimize the number histograms to be loaded in the memory.