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/models/cdb-request.js

@@ -10,17 +10,20 @@ module.exports = CdbRequest;
 
 CdbRequest.prototype.userByReq = function (req) {
     var host = req.headers.host || '';
+
     if (req.params.user) {
         return req.params.user;
     }
+
     var mat = host.match(this.RE_USER_FROM_HOST);
+
     if (!mat) {
-        global.logger.error("Pattern '%s' does not match hostname '%s'", this.RE_USER_FROM_HOST, host);
-        return;
+        return global.logger.error(new Error(`Pattern '${this.RE_USER_FROM_HOST}' does not match hostname '${host}'`));
     }
+
     if (mat.length !== 2) {
-        global.logger.error("Pattern '%s' gave unexpected matches against '%s': %s", this.RE_USER_FROM_HOST, host, mat);
-        return;
+        return global.logger.error(new Error(`Pattern '${this.RE_USER_FROM_HOST}' gave unexpected matches against '${host}': ${mat}`));
     }
+
     return mat[1];
 };