SAK-24180

Solve the puzzle of making Jackson 1.x generate properly formatted 
JSON-LD named contexts.  Turned out to be remarkably simple once I 
gave up looking for the hard solutions.



git-svn-id: https://source.sakaiproject.org/svn/basiclti/branches/BLTI-230@130690 66ffb92e-73f9-0310-93c1-f5514f145a0a