Support @Immediate services by default

HK2 has added a new feature called @Immediate services. These are services that are started as soon as they are bound into the system. It would be nice for Jersey to support this scope/context pair by default out of the box. This would be very similar to the PerThread scope/context pair that Jersey already supports out of the box.

Here is a request from the community to support this feature:

[http://stackoverflow.com/questions/20713086/what-corresponds-to-aseagersingleton-in-hk2-in-jersey-2/20721765#20721765](http://stackoverflow.com/questions/20713086/what-corresponds-to-aseagersingleton-in-hk2-in-jersey-2/20721765#20721765)
#### Affected Versions
[2.5.1]