MF standard sequences cleanup#31809

Merged

cmsbuild merged 2 commits intocms-sw:masterfrom

namapane:MFStandardSequencesCleanup

Oct 16, 2020

Commits on Oct 15, 2020

Replace deprecated MF configuration MagneticField_38T_PostLS1_cff with the standard one
namapane
committed
Fix ConfigBuilder.py to use the standard MF configuration
namapane
committed