RFR : 8173783: IllegalArgumentException: jdk.tls.namedGroups

[Seán Coffey]

The recent JDK-8148516 enhancement causes issue for JDKs without EC 
support. It's primarily an issue for JDK 6u which doesn't have SunEC but 
this still needs to be fixed in all release families.

bug report : https://bugs.openjdk.java.net/browse/JDK-8173783
webrev : http://cr.openjdk.java.net/~coffeys/webrev.8173783.jdk9/webrev/
regards,
Sean.