How big is this Pivotal cluster is in terms of capacity? If this is a small cluster then its better to install a new HDP cluster and use Distcp to transfer data b/w clusters. In addition if this is a large cluster then previous approach might take enormous time therefore I would suggest you to contact Hortonworks Support for official migration steps on same cluster.
thanks Jitendra, Installing new HDP cluster is a huge cost which most if us would like to avoid. Though this is an option but would like to check if there is any proven approach or documentation on in-place(same cluster) migration.