Urgent [9], 2nd round, RFR (S) : JDK-8039915 NumberFormat.format() does not consider required no. of fraction digits properly

[olivier.lagneau at oracle.com]

Please review this 2nd version of the fix taking into account your feedback.

Bug : https://bugs.openjdk.java.net/browse/JDK-8039915
webrev : http://cr.openjdk.java.net/~olagneau/8039915/webrev.00 
<http://cr.openjdk.java.net/%7Eolagneau/8039915/webrev.01 
<http://cr.openjdk.java.net/%7Eolagneau/8039915/webrev.00%20%3Chttp://cr.openjdk.java.net/%7Eolagneau/8039915/webrev.01>