Disable ChronoStatSvc print-out in trigger tests
There are two problems with ChronoStatSvc print-out:
- It is very long and makes the job logs large and difficult to read.
- It is using internal threading which causes message mangling, occasionally causing failures in log-comparison tests.
I'm applying a workaround suggested by @amete in !26764 (comment 2858454) to trigger tests here.