jshint: fix Dot notation

lib/cartodb/backends/pg_connection.js

@@ -30,7 +30,7 @@ PgConnection.prototype.setDBAuth = function(username, params, callback) {
         },
         function(err, user_id) {
             if (err) throw err;
-            user_params['user_id'] = user_id;
+            user_params.user_id = user_id;
             var dbuser = _.template(auth_user, user_params);
             _.extend(params, {dbuser:dbuser});
 
@@ -42,7 +42,7 @@ PgConnection.prototype.setDBAuth = function(username, params, callback) {
         },
         function(err, user_password) {
             if (err) throw err;
-            user_params['user_password'] = user_password;
+            user_params.user_password = user_password;
             if ( auth_pass ) {
                 var dbpass = _.template(auth_pass, user_params);
                 _.extend(params, {dbpassword:dbpass});

lib/cartodb/cartodb_windshaft.js

@@ -5,8 +5,8 @@ var Cache = require('./cache_validator');
 var os = require('os');
 var HealthCheck = require('./monitoring/health_check');
 
-if ( ! process.env['PGAPPNAME'] )
-  process.env['PGAPPNAME']='cartodb_tiler';
+if ( ! process.env.PGAPPNAME )
+  process.env.PGAPPNAME='cartodb_tiler';
 
 var CartodbWindshaft = function(serverOptions) {
     // Perform keyword substitution in statsd

lib/cartodb/template_maps.js

@@ -56,7 +56,7 @@ var o = TemplateMaps.prototype;
 //--------------- PRIVATE METHODS --------------------------------
 
 o._userTemplateLimit = function() {
-  return this.opts['max_user_templates'] || 0;
+  return this.opts.max_user_templates || 0;
 };
 
 /**