Simplify use of LCG devX slots
Using lcg-toolchains!67 (merged) we can simplify the configuration of lhcb-lcg-devX
slots.
The additional advantage is that the projects will report dev<X>/<day>
as version of LCG used, so that derived project will be able to inherit it the same way they inherit versions like 100
.
See LBCORE-2032
Edited by Marco Clemencic