hg: jdk/sandbox: 8210985: Update the default SSL session cache size to 20480

[chris.hegarty at oracle.com]

Changeset: 8a85d21d9616
Author:    xuelei
Date:      2018-11-29 08:43 -0800
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/8a85d21d9616

8210985: Update the default SSL session cache size to 20480
Reviewed-by: jnimeh, mullan

! src/java.base/share/classes/javax/net/ssl/SSLSessionContext.java
! src/java.base/share/classes/sun/security/ssl/SSLSessionContextImpl.java
+ test/jdk/sun/security/ssl/SSLSessionContextImpl/DefautlCacheSize.java