Tag to be used with the master branch of atlas/athena. Update(s) since 2.0.123: - Silenced the messages from OpenMP while looking for the BLAS library; - Made it possible to declare multiple environment variables in atlas_add_test; - Upgraded Gdb to version 11.1; - Added the location of the sqlite executable to the PATH environment variable; - Removed cppcheck from AthenaExternals.