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/backends/analysis.js

@@ -2,7 +2,6 @@
 
 var _ = require('underscore');
 var camshaft = require('camshaft');
-var fs = require('fs');
 
 var REDIS_LIMITS = {
     DB: 5,
@@ -14,7 +13,6 @@ function AnalysisBackend (metadataBackend, options) {
     this.options = options || {};
     this.options.limits = this.options.limits || {};
     this.setBatchConfig(this.options.batch);
-    this.setLoggerConfig(this.options.logger);
 }
 
 module.exports = AnalysisBackend;
@@ -27,30 +25,12 @@ AnalysisBackend.prototype.setBatchConfig = function (options) {
     this.batchConfig = batchConfig;
 };
 
-AnalysisBackend.prototype.setLoggerConfig = function (options) {
-    this.loggerConfig = options || {};
-
-    if (this.loggerConfig.filename) {
-        this.stream = fs.createWriteStream(this.loggerConfig.filename, { flags: 'a', encoding: 'utf8' });
-
-        process.on('SIGHUP', function () {
-            if (this.stream) {
-                this.stream.destroy();
-            }
-
-            this.stream = fs.createWriteStream(this.loggerConfig.filename, { flags: 'a', encoding: 'utf8' });
-        }.bind(this));
-    }
-};
-
 AnalysisBackend.prototype.create = function (analysisConfiguration, analysisDefinition, callback) {
     analysisConfiguration.batch.endpoint = this.batchConfig.endpoint;
     analysisConfiguration.batch.inlineExecution = this.batchConfig.inlineExecution;
     analysisConfiguration.batch.hostHeaderTemplate = this.batchConfig.hostHeaderTemplate;
 
-    analysisConfiguration.logger = {
-        stream: this.stream ? this.stream : process.stdout
-    };
+    analysisConfiguration.logger = global.logger;
 
     this.getAnalysesLimits(analysisConfiguration.user, function (err, limits) {
         if (err) {}