[8u40] approval request for 8055899: Two nashorn tests fail in 8u40 nightly build with ClassNotFoundException

[A. Sundararajan]

Please approve.

Bug: https://bugs.openjdk.java.net/browse/JDK-8055899
jdk9 review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2014-August/003315.html
jdk8 webrev: http://cr.openjdk.java.net/~sundar/8055899/8u40/

Changes backported "as is" without any jdk8 specific modification.

Thanks
-Sundar