[ML] Replace use of lodash get for obtaining hits total

Author: peteharverson

x-pack/plugins/ml/public/application/services/results_service/results_service.js

@@ -1229,7 +1229,7 @@ export function resultsServiceProvider(mlApiServices) {
             // Because of the sampling, results of metricFunctions which use sum or count
             // can be significantly skewed. Taking into account totalHits we calculate a
             // a factor to normalize results for these metricFunctions.
-            const totalHits = get(resp, ['hits', 'total', 'value'], 0);
+            const totalHits = resp.hits.total.value;
             const successfulShards = get(resp, ['_shards', 'successful'], 0);
 
             let normalizeFactor = 1;

x-pack/plugins/ml/server/models/data_visualizer/data_visualizer.ts

@@ -632,7 +632,7 @@ export class DataVisualizer {
       body: searchBody,
     });
     const aggregations = body.aggregations;
-    const totalCount = get(body, ['hits', 'total', 'value'], 0);
+    const totalCount = body.hits.total.value;
     const stats = {
       totalCount,
       aggregatableExistsFields: [] as FieldData[],