[8u60] RFA for 8098847: obj."prop" and obj.'prop' should result in SyntaxError,Reviewed-by: hannesw, attila

[A. Sundararajan]

Please approve.

Bug: https://bugs.openjdk.java.net/browse/JDK-8098847
jdk8u webrev: http://cr.openjdk.java.net/~sundar/8098847/8u60/webrev.00/
jdk9 review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2015-June/004777.html

Backported 'as is' except for modular source layout difference.

Thanks
-Sundar