Merge pull request #245 in CASA/casa6 from CAS-12315 to master
* commit '2fea6bc8351536d4538111e13b55d15a412eaf8b':
decrease freq of progress lines (type A) to every 10%, CAS-12315
fix frequency of partial summaries (type B), send other type A msgs to DEBUG level, CAS-12315
avoid minor code duplication in log messages, CAS-12315
fix frequency per-chunk progress update lines, separate frequency of messages types A and B, CAS-12315