removing hardcoded user

test/acceptance/rate-limit.test.js

@@ -12,7 +12,7 @@ const {
 let redisClient;
 let testClient;
 let keysToDelete = ['user:localhost:mapviews:global'];
-const user = 'cdb';
+const user = 'localhost';
 
 const query = `
     SELECT

test/unit/cartodb/rate-limit.test.js

@@ -13,7 +13,7 @@ const {
 
 let redisClient;
 let rateLimit;
-const user = 'cdb';
+const user = 'localhost';
 let keysToDelete = [];
 
 function setLimit(count, period, burst) {