JPA Enhancements

[ljnelson]

This epic is to track various JPA-related fixes and improvements. The sub-tasks in this epic are in no particular order and are subject to change, deletion or augmentation without notice.

• Inflate container-managed EntityManagerFactory client proxies early so that such inflation does not occur during a JTA-managed transaction (Container-managed EntityManagerFactory instances need eager inflation #3009)
• Update EclipseLink to 2.7.8 (MP: update to EclipseLink to latest version (currently newest version is 2.7.8) #3013, Updates Eclipselink to 2.7.8 #3042)
• Maven plugin for auto-including entity classes in a persistence.xml
• Investigate Testcontainers JUnit Jupiter support or similar
• Look at doing our own Eclipselink weaving plugin so we can avoid depending on the one we're using at the moment
• Make it easy to make PersistenceUnitInfo objects (they're already picked up if present as CDI beans but this is sort of a hidden feature at the moment)
• Move "pseudo-JTA" database driver support out to stand on its own (see JTA not working with CDI + JDBC (without JPA) #2777 for some related content) (Make pseudo-JTA driver support stand alone #3024, Adds integrations for pseudo-XA datasources #3089)
• Investigate Liquibase integration and general "set up the world" tasks, particularly for unit testing and lightweight-for-the-most-part integration tests (Enhancement request: Liquibase integration support #6336)