Don't download the external packages when running the code format checker.
This improves the run time from more than 4 minutes to less than  1 minute.
Test each file individually such that the results on CDash are shown for each
file separately.

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

The merge request ports the commits 16288, 16332, 16335-16336, 16411-16413 and 16509-16511.

Remove the ecal directory and the directory with the ecal data classes.
Adapt the build system accordingly. Closes #1756 @0.5h

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.