Build #2273

Parameters
 CURRENT_SIMREL
The simultaneous release that is currently heading for its first release.
 CURRENT_TOOLCHAIN
The toolchain required for the current simultaneous release.
 MAINTENANCE_SIMREL
The simultaneous release that is currently in maintenance mode, i.e., which is supplied with service releases.
 MAINTENANCE_TOOLCHAIN
The toolchain required for the maintenance simultaneous release.