Readd JMS, JPA, CDI examples and XATest #2484
Description
As Aries JPA, Aries CDI, PAX CDI and PAX JMS doesn't support jakarta namespaces, the examples that used them have been removed.
For Karaf 4.5.0, we should reintroduce these example without the dependencies to Aries or PAX. We can eventually create Karaf services as alternatives.