[9] RFR of 8080629: (fs) Re-enable ability to fsync() on directories even though read()s on those directories may fail.

[Brian Burkhalter]

Please review at your convenience.

Issue:	https://bugs.openjdk.java.net/browse/JDK-8080629
Patch:	http://cr.openjdk.java.net/~bpb/8080629/webrev.00/
Context:	http://mail.openjdk.java.net/pipermail/nio-dev/2015-May/003157.html

This is complete reversion of the patch applied to resolve https://bugs.openjdk.java.net/browse/JDK-8066915.

It is possible that only lines 284-286 in test/java/nio/Files/SBC.java could have been removed, but the entirety of the test file was reverted to its prior state. The tests in directoryOpenTests() may be reinstated at a later time.

The reverted code passes on Mac OS X and for form’s sake a complete JPRT run is in progress.

Thanks,

Brian