Remove trailing slash from ip-voltdb-api

This isn't really needed and some services are calling it
without the slash.

lib/metrics/services.js

@@ -162,7 +162,7 @@ module.exports = {
 	'insights-api': /^https:\/\/insights-api\.ft\.com\/v1\/aggregations.*/,
 	'insights-api-gateway': /^https:\/\/api.ft.com\/snr\/v1\/insights\/aggregations\/[\w\-]+/,
 	'insights-api-recommended-newsletters': /^https:\/\/api.ft.com\/snr\/v1\/insights\/recommended-newsletters\/[\w\-]+/,
-	'ip-voltdb-api': /^https?:\/\/voltdb-api-(us|eu|eu-test|global).in.ft.com\//,
+	'ip-voltdb-api': /^https?:\/\/voltdb-api-(us|eu|eu-test|global).in.ft.com/,
 	'kat': /^https?:\/\/kat\.ft\.com\/api\//,
 	'keen': /^https?:\/\/api\.keen\.io/,
 	'keen-proxy': /https:\/\/keen-proxy\.ft\.com\//,