JERSEY-2533: Jersey 2.8 and JSONP with missing closing parenthese for JsonStructure

 - Jersey prevents closing provided streams in MBR/MBW
 - updated MBR/MBW tests + reproducer test

Change-Id: Ibeac781462fc1db97507a94aa5986f52e2b4f7af
Signed-off-by: Michal Gajdos <michal.gajdos@oracle.com>
Merge "JERSEY-2533: Jersey 2.8 and JSONP with missing closing parenthese for JsonStructure"