8136436: jarsigner tests include both a warnings.sh and a warnings subdir

[Wang Weijun]

I’ve filed the bug at https://bugs.openjdk.java.net/browse/JDK-8136436.

jtreg first creates the "warnings" directory to store jtr files of tests in warnings subdir, and then clean it up and store retained files for warnings.sh there. The jtr files are now lost.

No webrev to look at, I just

cd test/sun/security/tools/jarsigner/
hg mv warnings.sh warning.sh

and the patch file looks like

diff --git a/test/sun/security/tools/jarsigner/warnings.sh b/test/sun/security/tools/jarsigner/warning.sh
rename from test/sun/security/tools/jarsigner/warnings.sh
rename to test/sun/security/tools/jarsigner/warning.sh

CCing Jon, there is no other solution, right?

Thanks
Max