RFR 8146619: Re-examine supportness of public classes in com.sun.security.auth.**

[Wang Weijun]

Please take a look at

   http://cr.openjdk.java.net/~weijun/8146619/webrev.00/

Basically, the following changes are made to all 7 classes:

+ * This class is subject to removal in a future version of Java SE.
  */
-@Deprecated
+@Deprecated(since="1.4", forRemoval=true)
 public class Xyz {

I still find it a little uneasy to directly remove them before making an 
announcement, so we will remove them in jdk10.

Thanks
Max