Implements User Script Categories

Implements #3280

scripts/plugins/suricata_collector/user_scripts/syslog/suricata.lua

@@ -8,8 +8,12 @@ require "lua_utils"
 require "flow_utils"
 local json = require ("dkjson")
 local alert_consts = require("alert_consts")
+local user_scripts = require("user_scripts")
 
 local syslog_module = {
+  -- Script category
+  category = user_scripts.script_categories.security,
+
   key = "suricata",
 
   -- See below