hg: jdk/sandbox: rollbak behavior changes of extended secret extension

[xuelei.fan at oracle.com]

Changeset: a423173d0578
Author:    xuelei
Date:      2018-05-15 13:01 -0700
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/a423173d0578

rollbak behavior changes of extended secret extension

! src/java.base/share/classes/sun/security/ssl/CertificateMessage.java
! src/java.base/share/classes/sun/security/ssl/ExtendedMasterSecretExtension.java
! src/java.base/share/classes/sun/security/ssl/HelloVerifyRequest.java
! src/java.base/share/classes/sun/security/ssl/SSLExtension.java
! src/java.base/share/classes/sun/security/ssl/SSLSessionImpl.java