8028615: jdk.nashorn.x3::some.serious.failure needs more memory to run

Reviewed-by: attila, sundar
diff --git a/nashorn/make/project.properties b/nashorn/make/project.properties
index 8210e25..ba4e57a 100644
--- a/nashorn/make/project.properties
+++ b/nashorn/make/project.properties
@@ -265,7 +265,7 @@
 test.src.dir=test/src
 
 # -Xmx is used for all tests, -Xms only for octane benchmark
-run.test.xmx=3G
+run.test.xmx=2G
 run.test.xms=2G
 
 run.test.user.language=tr