MT#16059 mod_sipwise_vhosts_sql: fix debug output

> mod_sipwise_vhosts_sql: conference_modules[conference.voip.sipwise.local]: table: 0xa2aae0

should be

> mod_sipwise_vhosts_sql: conference_modules[conference.voip.sipwise.local]: {"roster","saslauth","tls","dialback","disco","private","time","ping","pep","websocket","posix","carbons","carbons_copies","carbons_adhoc","csi","throttle_presence","filter_chatstates","sipwise_admin_telnet","sipwise_vcard_cusax","sipwise_vhosts_sql","sipwise_groups","sipwise_lastactivity"}

Change-Id: Ic22909a77526f89ca879ac4f9e3a97554ddf8d3a

plugins/mod_sipwise_vhosts_sql.lua

@@ -116,7 +116,7 @@ local function load_vhosts_from_db()
 				ut.table.add(conference_modules, "sipwise_pushd");
 			end
 			module:log("debug", "conference_modules[%s]: %s",
-				"conference."..row.domain, tostring(host_modules));
+				"conference."..row.domain, ut.table.tostring(host_modules));
 			configmanager.set("conference."..row.domain, "modules_enabled",
 				conference_modules);
 			local conference_config = configmanager.getconfig()["conference."..row.domain];