Review request for 8011697: ScriptEngine "js" randomly means either "rhino" or "nashorn", but should instead select one

[Andreas Rieber]

Hi,

the HashSet used for the script engine factories caused the random 
behaviour.

Bug:
https://bugs.openjdk.java.net/browse/JDK-8011697

Webrev:
http://cr.openjdk.java.net/~arieber/8011697/webrev.00/

Please review and sponsor required...

thanks
Andreas