Bug #411378 - JSON-P - Unmarshal from javax.json.stream.JsonParser

 ~ Add JsonParser support (Reader for JSR-353 stream (StAX) parser)

Signed-off-by: Iaroslav Savytskyi <iaroslav.savytskyi@oracle.com>

Reviewed-by:
  Martin Vojtek <martin.vojtek@oracle.com>,
  Marcel Valovy <marcel.valovy@oracle.com>