Pull request #2: CAS-13867: Clean up of #ifdef conditional compilations
Merge in CASA/casalogger from CAS-13867 to master
* commit '12ac6e287e0daaa47da1240e7cb93b931e537e8e':
Do not define CASATOOLS or CASA6. Define only USE_GRPC
Move forward casa-source pointer to latest CAS-13867 branch
Remove deprecated CASATOOLS ifdef
Point to casa-source in CAS-13867
Do not define CASATOOLS. Define USE_GRPC where needed.