2021-06-24 Boole v42r0

This version uses Lbcom v32r2, LHCb v52r2, Gaudi v36r0 and LCG 100 with ROOT 6.24.00.

This version is released on master branch. Built relative to Boole v41r3, with the following changes:

New features new feature

Fixes bug fix workaround

Code cleanups and changes to tests modernisation cleanup testing