Add new DDR command constantpool

[thallium]

Fix #15128 @fengxue-IS

[thallium]

@fengxue-IS ready to be reviewed

[fengxue-IS]

@keithc-ca can you please review this, thanks @tajila FYI

[fengxue-IS]

@keithc-ca can this PR be merged or do you have any additional concern that you would like to see addressed?

[keithc-ca]

I'll have another look shortly.

[thallium]

I might somehow messed up with the branch and I'm trying to get it fixed.

[fengxue-IS]

FYI https://github.com/eclipse-openj9/openj9/commit/379aa5af7ee467af7cafb1abed9aa3e1fd3e041d seem to be the snapshot before incorrect merge

[thallium]

FYI 379aa5a seem to be the snapshot before incorrect merge

yeah I pushed the master branch in my java 19 repo without realizing it's not in sync with my java 18 repo which contains the latest changes.

[keithc-ca]

See https://github.com/eclipse-openj9/openj9/issues/15128#issuecomment-1212427171.

[fengxue-IS]

See #15128 (comment).

Copying reply from https://github.com/eclipse-openj9/openj9/issues/15128#issuecomment-1212436668

This is expected as when a classfile is loaded by the VM, CP entries will be optimized by the JVM (items reordered : ldc entries moved to the top, long and double moved to the end, UTF8 that do not get referenced directly gets removed from constantpool and referenced via SRPs)

[fengxue-IS]

@keithc-ca can you take another look

[thallium]

@keithc-ca Your comments have been addressed

[keithc-ca]

jenkins test sanity alinux64 jdk8,jdk17