Analyses limit configuration allows to set other limits than timeout

Configuration is now defined as a dictionary instead of just timeouts
per analysis type

lib/cartodb/backends/analysis.js

@@ -12,6 +12,7 @@ var REDIS_LIMITS = {
 function AnalysisBackend (metadataBackend, options) {
     this.metadataBackend = metadataBackend;
     this.options = options || {};
+    this.options.limits = this.options.limits || {};
     this.setBatchConfig(this.options.batch);
     this.setLoggerConfig(this.options.logger);
 }
@@ -59,24 +60,32 @@ AnalysisBackend.prototype.create = function(analysisConfiguration, analysisDefin
 
 AnalysisBackend.prototype.getAnalysesLimits = function(username, callback) {
     var self = this;
+
+    var analysesLimits = {
+        analyses: {
+            // buffer: {
+            //     timeout: 1000,
+            //     maxNumberOfRows: 1e6
+            // }
+        }
+    };
+
+    Object.keys(self.options.limits).forEach(function(analysisTypeOrTag) {
+        analysesLimits.analyses[analysisTypeOrTag] = _.extend({}, self.options.limits[analysisTypeOrTag]);
+    });
+
     var analysesLimitsKey = REDIS_LIMITS.PREFIX + username;
     this.metadataBackend.redisCmd(REDIS_LIMITS.DB, 'HGETALL', [analysesLimitsKey], function(err, analysesTimeouts) {
+        // analysesTimeouts wil be something like: { moran: 3000, intersection: 5000 }
         analysesTimeouts = analysesTimeouts || {};
 
-        _.defaults(analysesTimeouts, self.options.limits);
-
-        var analysesLimits = {
-            analyses: {
-                // buffer: {
-                //     timeout: 1000
-                // }
-            }
-        };
-
         Object.keys(analysesTimeouts).forEach(function(analysisType) {
-            analysesLimits.analyses[analysisType] = {
-                timeout: Number.isFinite(+analysesTimeouts[analysisType]) ? +analysesTimeouts[analysisType] : 0
-            };
+            analysesLimits.analyses[analysisType] = _.defaults(
+                {
+                    timeout: Number.isFinite(+analysesTimeouts[analysisType]) ? +analysesTimeouts[analysisType] : 0
+                },
+                analysesLimits.analyses[analysisType]
+            );
         });
 
         return callback(null, analysesLimits);