[9] RFR of 8042377: BufferedWriter and FilteredOutputStream.close throw IAE if flush and close throw equal exceptions

[Brian Burkhalter]

Please review at your convenience.

Issue:  https://bugs.openjdk.java.net/browse/JDK-8042377
Patch:  http://cr.openjdk.java.net/~bpb/8042377/webrev.00/

The use of try-with-resources in FilteredOutputStream.close() is replaced with 
explicit handling of IOExceptions potentially thrown by flush() or close(). A 
test covering all cases is added.

Thanks,

Brian