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/map/preview-template-controller.js

@@ -347,7 +347,7 @@ function incrementMapViews ({ metadataBackend }) {
 
         mapConfigProvider.getMapConfig((err, mapConfig) => {
             if (err) {
-                global.logger.log(incrementMapViewsError({ user, err }));
+                global.logger.info(incrementMapViewsError({ user, err }));
                 return next();
             }
 
@@ -359,7 +359,7 @@ function incrementMapViews ({ metadataBackend }) {
 
             metadataBackend.incMapviewCount(user, statTag, (err) => {
                 if (err) {
-                    global.logger.log(incrementMapViewsError({ user, err }));
+                    global.logger.info(incrementMapViewsError({ user, err }));
                 }
 
                 next();