fix tophits and multisearch failinig tests

Author: Mpdreamz

src/Tests/Aggregations/Metric/TopHits/TopHitsAggregationUsageTests.cs

@@ -65,7 +65,6 @@ public TopHitsAggregationUsageTests(ReadOnlyCluster i, EndpointUsage usage) : ba
 										script = new
 										{
 											inline = "doc['numberOfCommits'].value * 2",
-											lang = "groovy"
 										}
 									}
 								}
@@ -111,7 +110,6 @@ public TopHitsAggregationUsageTests(ReadOnlyCluster i, EndpointUsage usage) : ba
 							.ScriptFields(sfs => sfs
 								.ScriptField("commit_factor", sf => sf
 									.Inline("doc['numberOfCommits'].value * 2")
-									.Lang("groovy")
 								)
 							)
 						)
@@ -151,7 +149,7 @@ public TopHitsAggregationUsageTests(ReadOnlyCluster i, EndpointUsage usage) : ba
 						ScriptFields = new ScriptFields
 						{
 							{ "commit_factor", new ScriptField {
-								Script = new InlineScript("doc['numberOfCommits'].value * 2") { Lang = "groovy" }
+								Script = new InlineScript("doc['numberOfCommits'].value * 2")
 							} }
 						}
 					}

src/Tests/Search/MultiSearch/MultiSearchApiTests.cs

@@ -129,8 +129,7 @@ [I] public Task AssertResponse() => AssertOnAllResponses(r =>
 			projects.Documents.Should().HaveCount(10);
 
 			var projectsCount = r.GetResponse<Project>("count_project");
-			projectsCount.ShouldBeValid();
-			projectsCount.Documents.Should().HaveCount(0);
+			projectsCount.Should().BeNull();
 
 			var developers = r.GetResponse<Developer>("5developers");
 			developers.ShouldBeValid();