Test mcbm beamtime setups 2020_03 and 2021_03 instead of the 2019 ones.
Correct the reconstruction macro accordingly.

Apply code formatting to all source/header files and root macros.

This version is an exact copy of the last revision of the trunk branch
of the old SVN repository of CbmRoor at
https://subversion.gsi.de/cbmsoft/cbmroot/trunk
The old SVN repository will still be available for read access.