Mute agent output

[Jorn Vernee]

Hi,

We are running tests with jtreg that call the native printf function. As 
a result a lot of agent log output is being printed, e.g.:

[2019-02-20 13:02:24,883] Agent[6]: stdout: hello(str,str,h)
[2019-02-20 13:02:24,883] Agent[6]: stdout: hello(42,h,h,42)
[2019-02-20 13:02:24,883] Agent[6]: stdout: hello(h,h,0.0000)
[2019-02-20 13:02:24,883] Agent[6]: stdout: hello(42,str,42,42)
[2019-02-20 13:02:24,883] Agent[6]: stdout: hello(h,str,str)
[2019-02-20 13:02:24,883] Agent[6]: stdout: hello(42,h,str)
[2019-02-20 13:02:24,883] Agent[6]: stdout: hello(h,h,0.0000,1.2345)

There are a lot of these outputs, and this is filling the entire console 
buffer, so it ends up erasing the console log from before the test run. 
Sometimes when I need to look at that I can't because it's erased. I'd 
like to be able to turn of this logging, since I don't really need to 
see what's being printed. Is there any way to do this currently?

FWIW, I tried looking into implementing this, but I've not been able to 
build jtreg with cygwin, since the build-all.sh script is passing cygwin 
file system (i.e. unix) paths up to Ant, which can not understand those 
paths. I've tried to work around this by converting the paths to Windows 
one, but this still ends up blowing up somewhere down the line. Any tips 
for that as well?

Thanks,
Jorn