SW-835: reverted back to commit d63f5d4c. The weird casting was ok after all, but it needs the proper DAL version >= 3.3.1

SW-835: made a copy of Docker/lofar-outputproc and used it as a basis for Docker/lofar-subbandtbbwriter, which is not to be confused with Docker/lofar-tbbwriter which is maintained by Sander/Nijmegen

Resolve SW-836

Closes SW-836

See merge request !86

Merge back holography to master

See merge request !44

# Conflicts:
#   CMake/LofarPackageList.cmake

This reverts commit 994ecf42