Dependency of lhcb-sim10 slot changed to what was in lhcb-gauss-dev. All compatible slots (lhcb-gauss-fast, lhcb-gauss-gen2-dev, lhcb-gauss-lamarr) follow.
lhcb-gauss-dev updated to use latest released lhcb v53r1
cc: @kreps, @adavis