Release of Geant4 10.6.p02 with patch from 10.7 to speed up Sim10
This release is to speed up Sim10.
It requires !90 (merged)
The version in the Cmakefile is to be set to 10.6.2.7 and the tag to v10r6p2t7.
Need to define in the next couple of days if we can have only one based on LCG_102b, needed for ARM, or we will need a faster one for x86 still based on LCG_101.