The JTA integration test CMRIntegrationTest fails because of the changes in WildFly 25. The WFLY version removed completely the old configuration of the security and all is now configured through the Elytron.
The CMRIntegrationTest uses own standalone-cmr.xml configuration which uses the removed security-realms configuration.
See: https://github.com/jbosstm/narayana/blob/5.12.1.Final/ArjunaJTA/jta/src/test/resources/standalone-cmr.xml

For the test would be working on WFLY 25 it's needed to change the standalone-cmr.xml configuration or to use the jboss-cli that will work with existing xml configuration and just adds what's needed for the test to pass.