SUSYTools - Update SUSYToolsAlg, associated tests and documentation
MR mainly to update the various tests in ST, changes include
- Update SUSYTools README
- fix configuration of METSignificance tool in AthAnalysis
- fix METPointers in SUSYToolsAlg (by @mrimoldi from !71921 (closed).)
- fix some accessors in SUSYToolsAlg.cxx
- update ST test algs for AnaBase and AthAnalysis
- add ART tests for mc23d
Tagging @mhank
Edited by Michael Holzbock