[8u20] please approve 8043443: Test framework changes to run script tests without security manager

[A. Sundararajan]

Hi,

Please approve backport of fix for 8043443: Test framework changes to 
run script tests without security manager

jdk9 webrev: http://cr.openjdk.java.net/~sundar/8043443/
jdk9 review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2014-May/002997.html
jdk9 changeset: http://hg.openjdk.java.net/jdk9/dev/nashorn/rev/185501198f64

Thanks,
-Sundar