Library does not work correctly in TomEE WebApps

Because TomEE provides a set of libraries on its own class path, and certain applications may do the same there needs to be an exclusion, the following defects have been found:

- The javax namespace has been deprecated, now it is jakarta and this is reflected in version 4.0.3 of the CXF dependency
- The http-components need to be declared inside gradle via:
`configurations {
all*.exclude module: 'httpcore'
all*.exclude module: 'httpcore-nio'
}`

otherwise, the container starts spewing errors about the same class being loaded by two different class loaders.

Whereas (2) is more of a problem specific to containers, it should be documented somehow if someone is trying to use this in an enterprise app where dependencies are provided.