Update version of Jersey (2.4-SNAPSHOT -> 2.5-SNAPSHOT) in performance tests.

Change-Id: Id80a172e35bcfbbfc6ce2fdc2e298afcc99c7a19
Minor update in SSE documentation.

- Added explanation of the difference between Jersey ChunkedOutput and JAX-RS StreamingOutput.

Change-Id: I08114b0ec04602fb6d83b1b0aa4cdcb17d28a86e
Signed-off-by: Marek Potociar <marek.potociar@oracle.com>
Merge "Minor update in SSE documentation."