Replace log4js by pino as logger:

- Logs to stdout, disabled while testing
- Change log calls signature when needed
- Use development version of camshaft
- Removes unused log cofiguration
- Bind request id to log req/res
- Log req at the begining of the cycle and res at the end

lib/api/middlewares/increment-map-view-count.js

@@ -14,7 +14,7 @@ module.exports = function incrementMapViewCount (metadataBackend) {
             req.profiler.done('incMapviewCount');
 
             if (err) {
-                global.logger.log(`ERROR: failed to increment mapview count for user '${user}': ${err.message}`);
+                global.logger.warn(err, `ERROR: failed to increment mapview count for user '${user}'`);
             }
 
             next();