RFR: 8173888: Test for JDK-8169481 causes stack overflows in parser tests

[Hannes Wallnöfer]

Please review:

Bug: https://bugs.openjdk.java.net/browse/JDK-8173888
Webrev: http://cr.openjdk.java.net/~hannesw/8173888/webrev.00/

Note that the bug that introduced the problematic test is confidential, the changeset contained adjustments to the splitter weight calculation:

http://hg.openjdk.java.net/jdk9/dev/nashorn/rev/ea1d4ecf5862

Thanks,
Hannes