This bug is created as a clone of upstream ticket:
https://fedorahosted.org/freeipa/ticket/3656

Provide a tool to migrate from FreeIPA to FreeIPA.

Currently FreeIPA can migrate users and groups from a generic LDAP server, but if you already have an IPA deployment there is currently no mechanism to migrate FreeIPA-specific data such as SUDO rules, HBAC, automount, hosts, services, etc (these last two may not be possible as re-enrollment of the client is required).