Generic MapConfig adapter can receive an arbitrary number of adapters

lib/cartodb/models/mapconfig/adapter/index.js

@@ -1,7 +1,7 @@
 'use strict';
 
-function MapConfigAdapter(adapters) {
-    this.adapters = adapters;
+function MapConfigAdapter() {
+    this.adapters = Array.apply(null, arguments);
 }
 
 module.exports = MapConfigAdapter;

lib/cartodb/server.js

@@ -156,13 +156,13 @@ module.exports = function(serverOptions) {
 
     var turboCartoParser = new TurboCartoParser(pgQueryRunner);
 
-    var mapConfigAdapter = new MapConfigAdapter([
+    var mapConfigAdapter = new MapConfigAdapter(
         new MapConfigNamedLayersAdapter(templateMaps, pgConnection),
         new SqlWrapMapConfigAdapter(),
         new AnalysisMapConfigAdapter(analysisBackend),
         new MapConfigOverviewsAdapter(overviewsMetadataApi, filterStatsApi),
         new TurboCartoAdapter(turboCartoParser)
-    ]);
+    );
 
     var namedMapProviderCache = new NamedMapProviderCache(
         templateMaps,