Added table creation of EdxPiazza.content, and EdxForum.content to mymysqlProcAndFuncBodies.sql.
Added table creation of EdxPiazza.content, and EdxForum.content to mymysqlProcAndFuncBodies.sql.

paepcke/json_to_relation,paepcke/json_to_relation,paepcke/json_to_relation,paepcke/json_to_relation