fixes for custom voice testing in azure

lib/utils/db-utils.js

@@ -39,6 +39,8 @@ const speechMapper = (cred) => {
       obj.region = o.region;
       obj.use_custom_stt = o.use_custom_stt;
       obj.custom_stt_endpoint = o.custom_stt_endpoint;
+      obj.use_custom_tts = o.use_custom_tts;
+      obj.custom_tts_endpoint = o.custom_tts_endpoint;
     }
     else if ('wellsaid' === obj.vendor) {
       const o = JSON.parse(decrypt(credential));