Merge pull request #13571 from mtanda/cw_unit

cloudwatch: automatically set graph yaxis unit 

fixes #13575

public/app/plugins/datasource/cloudwatch/datasource.ts

@@ -131,7 +131,7 @@ export default class CloudWatchDatasource {
       if (res.results) {
         _.forEach(res.results, queryRes => {
           _.forEach(queryRes.series, series => {
-            data.push({ target: series.name, datapoints: series.points });
+            data.push({ target: series.name, datapoints: series.points, unit: queryRes.meta.unit || 'none' });
           });
         });
       }

public/app/plugins/datasource/cloudwatch/specs/datasource.test.ts

@@ -60,6 +60,7 @@ describe('CloudWatchDatasource', () => {
         A: {
           error: '',
           refId: 'A',
+          meta: {},
           series: [
             {
               name: 'CPUUtilization_Average',
@@ -221,6 +222,7 @@ describe('CloudWatchDatasource', () => {
         A: {
           error: '',
           refId: 'A',
+          meta: {},
           series: [
             {
               name: 'TargetResponseTime_p90.00',