Bug 531949 - Support JSON-LD & deprecate provider-json4j Initial support for JSON-LD. Almost didn't use anything from Ricardo's patch due to high amount of duplication in his code. Change-Id: I3145f9e6da826b96595384c1d774f0223af5acf1 Signed-off-by: Andrew Berezovskyi <andriib@kth.se>