Rename user limits api by user limits backend

lib/cartodb/api/api-router.js

@@ -14,7 +14,7 @@ const PgQueryRunner = require('../backends/pg_query_runner');
 const StatsBackend = require('../backends/stats');
 const AuthBackend = require('../backends/auth');
 
-const UserLimitsApi = require('../backends/api/user_limits_api');
+const UserLimitsBackend = require('../backends/user-limits');
 const OverviewsMetadataBackend = require('../backends/overviews-metadata');
 const FilterStatsApi = require('../backends/filter-stats');
 const TablesExtentBackend = require('../backends/tables-extent');
@@ -106,7 +106,7 @@ module.exports = class ApiRouter {
         const dataviewBackend = new DataviewBackend(analysisBackend);
         const statsBackend = new StatsBackend();
 
-        const userLimitsApi = new UserLimitsApi(metadataBackend, {
+        const userLimitsBackend = new UserLimitsBackend(metadataBackend, {
             limits: {
                 cacheOnTimeout: serverOptions.renderer.mapnik.limits.cacheOnTimeout || false,
                 render: serverOptions.renderer.mapnik.limits.render || 0,
@@ -145,7 +145,7 @@ module.exports = class ApiRouter {
             templateMaps,
             pgConnection,
             metadataBackend,
-            userLimitsApi,
+            userLimitsBackend,
             mapConfigAdapter,
             layergroupAffectedTablesCache
         );
@@ -162,7 +162,7 @@ module.exports = class ApiRouter {
             tileBackend,
             pgConnection,
             mapStore,
-            userLimitsApi,
+            userLimitsBackend,
             layergroupAffectedTablesCache,
             authBackend,
             surrogateKeysCache,