Request for approval for CR 7086601 "Error message bug: cause for method mismatch is 'null'"

[Dmeetry Degrave]

Request for jdk7 update 4.

7086601 "Error message bug: cause for method mismatch is 'null'"
http://bugs.sun.com/view_bug.do?bug_id=7086601

This is a backport from jdk8 to 7u4 with identical fix.

jdk8: http://hg.openjdk.java.net/jdk8/tl/langtools/rev/3a2200681d69
jdk7: http://cr.openjdk.java.net/~dmeetry/7086601/webrev.00

Reviewed by Maurizio Cimadamore.

thanks,
dmeetry