Support setting compression algorithm with mdf_writer
Follow up from lhcb-dpa/prod-requests#8 (comment 7072971)
Introduce support for specifying compression algorithms alongside the existing compression level for MDF event bodies by:
- Addding
m_compressAlg
member and correspondingCompressAlg
property toMDFWriter
/RawDataCnvSvc
- Modifing
mdf_writer
function to support the compression algorithm parameter - Adapt
mergeMDF
to set the compression based on what is in the LbExec Options object.