[8u60] approval request for 8068462: javax.script.ScriptEngineFactory.getParameter spec is not completely consistent with the rest of the API

[A. Sundararajan]

Please approve.

bug: https://bugs.openjdk.java.net/browse/JDK-8068462
jdk9 review thread: 
http://mail.openjdk.java.net/pipermail/core-libs-dev/2015-January/030607.html
jdk8u webrev: http://cr.openjdk.java.net/~sundar/8068462/8u60/webrev.00/

Thanks
-Sundar