Do not use global logger in middlewares, use the one initialized in res.locals instead

lib/api/map/preview-template-controller.js

@@ -70,7 +70,6 @@ module.exports = class PreviewTemplateController {
             metrics({
                 enabled: this.config.pubSubMetrics.enabled,
                 metricsBackend: this.metricsBackend,
-                logger: global.logger,
                 tags: metricsTags
             }),
             credentials(),
@@ -337,17 +336,13 @@ function setContentTypeHeader () {
     };
 }
 
-function incrementMapViewsError (ctx) {
-    return `ERROR: failed to increment mapview count for user '${ctx.user}': ${ctx.err}`;
-}
-
 function incrementMapViews ({ metadataBackend }) {
     return function incrementMapViewsMiddleware (req, res, next) {
-        const { user, mapConfigProvider } = res.locals;
+        const { user, mapConfigProvider, logger } = res.locals;
 
         mapConfigProvider.getMapConfig((err, mapConfig) => {
             if (err) {
-                global.logger.info(incrementMapViewsError({ user, err }));
+                logger.warn(err, `ERROR: failed to increment mapview count for user '${user}'`);
                 return next();
             }
 
@@ -359,7 +354,7 @@ function incrementMapViews ({ metadataBackend }) {
 
             metadataBackend.incMapviewCount(user, statTag, (err) => {
                 if (err) {
-                    global.logger.info(incrementMapViewsError({ user, err }));
+                    logger.warn(err, `ERROR: failed to increment mapview count for user '${user}'`);
                 }
 
                 next();