Switch to LCG layer LHCB_7
This is to move to LCG101 layer LHCB_7. From the generators point of view, it is the same as LCG100 layer LHCB_6 except for Madgraph for which we have version 2.9.3.
Requires new release of MadGraphData, lhcb-datapkg/Gen/MadgraphData#8 (closed)
Edited by Gloria Corti