api: API trace improvements

Type: improvement

 * add support for JSON format in API trace
 * add ability to replay JSON API trace in both VPP and VAT2
 * use CRC for backward compatibility check during JSON API replay
 * fix API trace CLI (and remove duplicits)
 * remove custom dump
 * remove vppapitrace.py
 * update docs accordingly

Change-Id: I5294f68bebe6cbe738630f457f3a87720e06486b
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>
Signed-off-by: Ole Troan <ot@cisco.com>
diff --git a/src/vat/api_format.c b/src/vat/api_format.c
index 1458fde..61ac92f 100644
--- a/src/vat/api_format.c
+++ b/src/vat/api_format.c
@@ -2627,7 +2627,9 @@
 #define _(N, n)                                                               \
   vl_msg_api_set_handlers (VL_API_##N + 1, #n, vl_api_##n##_t_handler_uni,    \
 			   vl_noop_handler, vl_api_##n##_t_endian,            \
-			   vl_api_##n##_t_print, sizeof (vl_api_##n##_t), 1);
+			   vl_api_##n##_t_print, sizeof (vl_api_##n##_t), 1,  \
+			   vl_api_##n##_t_print_json, vl_api_##n##_t_tojson,  \
+			   vl_api_##n##_t_fromjson);
   foreach_vpe_api_reply_msg;
 #if VPP_API_TEST_BUILTIN == 0
   foreach_standalone_reply_msg;