Sampler agg test for bg count should only be asserted 5.5.0 and up

Author: Mpdreamz

src/Tests/Aggregations/Bucket/Sampler/SamplerAggregationUsageTests.cs

@@ -69,8 +69,9 @@ protected override void ExpectResponse(ISearchResponse<Project> response)
 			sample.Should().NotBeNull();
 			var sigTags = sample.SignificantTerms("significant_names");
 			sigTags.Should().NotBeNull();
-			sigTags.BgCount.Should().BeGreaterThan(0);
 			sigTags.DocCount.Should().BeGreaterThan(0);
+			if (TestClient.VersionUnderTestSatisfiedBy(">=5.5.0"))
+				sigTags.BgCount.Should().BeGreaterThan(0);
 		}
 	}
 }

src/Tests/ClientConcepts/Certificates/SslAndKpiXPackCluster.cs

@@ -31,22 +31,6 @@ public abstract class SslAndKpiXPackCluster : XPackCluster
 			"xpack.security.http.ssl.enabled=true",
 		};
 
-//		private static readonly object _lock = new object();
-//		private static int _port = 9200;
-//		private int? _desiredPort;
-//		public override int DesiredPort
-//		{
-//			get
-//			{
-//				lock (_lock)
-//				{
-//                    if (!this._desiredPort.HasValue)
-//                        this._desiredPort = ++_port;
-//                    return this._desiredPort.Value;
-//				}
-//			}
-//		}
-
 		public override ConnectionSettings ClusterConnectionSettings(ConnectionSettings s) =>
 			this.ConnectionSettings(Authenticate(s));
 

src/Tests/Framework/ManagedElasticsearch/Clusters/XPackCluster.cs

@@ -1,4 +1,5 @@
-using System.Linq;
+using System;
+using System.Linq;
 using Nest;
 using Tests.Framework.Integration;
 using Tests.Framework.ManagedElasticsearch.Plugins;
@@ -8,10 +9,11 @@ namespace Tests.Framework.ManagedElasticsearch.Clusters
 	[RequiresPlugin(ElasticsearchPlugin.XPack)]
 	public class XPackCluster : ClusterBase
 	{
-        protected override string[] AdditionalServerSettings => base.AdditionalServerSettings.Concat(new[]
-        {
-	        "xpack.security.authc.token.enabled=true"
-        }).ToArray();
+		protected string[] XPackSettings => TestClient.VersionUnderTestSatisfiedBy(">=5.5.0")
+			? new[] {"xpack.security.authc.token.enabled=true"}
+			: Array.Empty<string>();
+
+        protected override string[] AdditionalServerSettings => base.AdditionalServerSettings.Concat(this.XPackSettings).ToArray();
 
 		public override ConnectionSettings ClusterConnectionSettings(ConnectionSettings s) =>
 			s.BasicAuthentication("es_admin", "es_admin");