[8u60] approval request for 8007456: Nashorn test framework @argument does not handle quoted strings

[A. Sundararajan]

Please approve.


Bug:  https://bugs.openjdk.java.net/browse/JDK-8007456
jdk9 review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2015-May/004611.html
jdk8u-dev webrev: http://cr.openjdk.java.net/~sundar/8007456/8u60/webrev.00/

Thanks,
-Sundar