Add CDI (not cdi-se) integration module

Sometimes people already have a working Tomcat + CDI (doesnt matter if Weld or OWB) setup.
In this case it should be possible to easily add a jersey-cdi module, which relies on the already running CDI container.

A good alternative would be to rename the "cdi-se" module to "cdi" and check there for a running CDI container, first.

Start by locating the existing cdi-se module and understanding how it starts or accesses a CDI container. Compare the proposed jersey-cdi module with the alternative of renaming cdi-se, including support for externally running Weld or OWB in Tomcat. Done means Jersey can integrate with an already running CDI container without requiring a CDI SE setup.

Written by the indexing model from the issue text.