SUSYTools - fix configuration of METSignificance in SUSYTools for AthAnalysis
Running SUSYTools in AthAnalysis was broken since a while as some change in METSignificance enforced the "privateness" of the MuonCalibration tool within METSignificance. This doesn't allow anymore to pass an existing MuonCalibration tool to METSignificance. Instead, we configure now the subtool manually within SUSYTools in AthAnalysis.
Tagging @mhank