hg: jdk/sandbox: Enable constant pool caching

[erik.gahlin at oracle.com]

Changeset: de154169948b
Author:    egahlin
Date:      2019-07-11 02:21 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/de154169948b

Enable constant pool caching

! src/jdk.jfr/share/classes/jdk/jfr/consumer/ChunkParser.java
! src/jdk.jfr/share/classes/jdk/jfr/consumer/ConstantLookup.java
! src/jdk.jfr/share/classes/jdk/jfr/consumer/ConstantMap.java