Corrected some module issues introduced by r383579.

When I moved res_json.c to json.c, I left the MODULE_INFO stuff in there,
which was interesting if you ran module show. I also forgot to call what
was in module_load() from asterisk main().


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@383611 f38db490-d61c-443f-a65b-d21fe96a405b