AMBARI-18280 Ambari widget graph is not aggregating the data correctly for Total Request Count (zhewang)

ambari-web/app/utils/ajax/ajax.js

@@ -1100,7 +1100,7 @@ var urls = {
     'testInProduction': true
   },
   'service.metrics.ambari_metrics.region_server.request': {
-    'real': '/clusters/{clusterName}/services/AMBARI_METRICS/components/METRICS_COLLECTOR?fields=metrics/hbase/regionserver/requests[{fromSeconds},{toSeconds},{stepSeconds}]',
+    'real': '/clusters/{clusterName}/services/AMBARI_METRICS/components/METRICS_COLLECTOR?fields=metrics/hbase/regionserver/requests._rate[{fromSeconds},{toSeconds},{stepSeconds}]',
     'mock': '/data/services/metrics/ambari_metrics/regionserver_requests.json',
     'testInProduction': true
   },

ambari-web/app/views/main/service/info/metrics/ambari_metrics/regionserver_requests.js

@@ -33,9 +33,9 @@ App.ChartServiceMetricsAMS_RegionServerRequests = App.ChartServiceMetricsAMS_Reg
 
   loadGroup: {
     name: 'service.metrics.ambari_metrics.aggregated',
-    fields: ['metrics/hbase/regionserver/requests']
+    fields: ['metrics/hbase/regionserver/requests._rate']
   },
 
   displayName: Em.I18n.t('services.service.info.metrics.ambariMetrics.regionServer.displayNames.requestCount'),
-  regionServerName: 'requests'
+  regionServerName: 'requests._rate'
 });