Update Jenkinsfile for 3.1 (#4327)
Update Jenkinsfile for 3.1 (#4327)

* Update Jenkinsfile for 3.1

* Update CODEOWNERS

* Revert "Update CODEOWNERS"

This reverts commit 289454a28ea1e71ee1f5710d0cdc1c2df97964b5.
splicemachine/spliceengine,splicemachine/spliceengine,splicemachine/spliceengine,splicemachine/spliceengine,splicemachine/spliceengine,splicemachine/spliceengine,splicemachine/spliceengine