ANY23-221 Enable JSON-LD as an input format for the WebService at any23.org

This issue relates to 
https://issues.apache.org/jira/browse/ANY23-221
 * It is a full improvement on what is described on the issue above however I have found a problem where auto-detect will not work for this instance. I therefore need to look further into this to ensure that auto-detection works as expected as oppose to having to explicitly select JSON-LD as the input format.
 * This issue also upgrades the jsonld-java-sesame library as we were getting class cast acception between converion from String to Map.
 * Finally the issue removes a duplicate form.html which I added a while back but which is no longer required I don't think.