RFR: JDK8022410 - Fix Javac Warnings in com.sun.security.auth Package

[Dan Xu]

HiAll,

Please review the warning fix in com.sun.security.auth package. They are 
all [deprecation] warnings. Thanks!

webrev: http://cr.openjdk.java.net/~dxu/8022410/webrev.00/

Thanks,

-Dan