You are able to use the APPS (EJB based) apis in the container more or less unchanged - there are some small changes in the JAR files to include (there is a new stub jar and some name changes) - application code should not need any changes but of course there can be infrastructure changes as you cannot run the code on the IVIG Liberty server but need a dedicated application server somewhere else.
Here is what is mentioned in the "whats new" :
- Support for EJB APIs
- This release delivers Enterprise Java Beans (EJB) APIs for IBM Verify Identity Governance - Container.
- To access these APIs, go to <Starter>/bin/util directory and run the script ./getExtensions.sh
- Next, go to /extensions/<ReleaseVersion>/examples/ejb_apps directory. Open the readme.html file for detailed instructions to set up the Java client for accessing the EJB APIs as well as code samples.
HTH