RFR: JDK-8186160 Fix a11y issues in java.security package

[Weijun Wang]

> 
> FWIW, there is one remaining issue to be addressed: it is a broken link in Provider.html.
> It comes from Provider.replace(Object, Object, Object) which overrides
> Properties.replace(Object, Object, Object), but for some reason, that method is
> marked @hidden in Properties, causing a broken link in Provider. That needs
> to be investigated, but I don't want to block these accessibility fixes.

I don't understand why there is a @hidden in Properties.java. There are many other methods nearby with a similar structure and I cannot see how this one is different.

The tag was added at

   http://hg.openjdk.java.net/jdk9/dev/jdk/rev/01a8615439f0#l2.349

in the fix for 

   8029891 : Deadlock detected in java/lang/ClassLoader/deadlock/GetResource.java

+
+    /** @hidden */
+    @Override
+    public synchronized boolean replace(Object key, Object oldValue, Object newValue) {
+        return map.replace(key, oldValue, newValue);
+    }

*Brent*: Is this method any special?

Thanks
Max

> 
> -- Jon