Add BWC changes to client for 6.2 release. (#3306)

* Add BWC changes to `6.2` release

Author: Stuart Cam

src/CodeGeneration/ApiGenerator/Views/RequestParameters.Generated.cshtml

@@ -19,7 +19,7 @@ namespace Elasticsearch.Net
 	{
 <text>
 	///<summary>Request options for @method.FullName<pre>@method.Documentation</pre></summary>
-	public class @method.QueryStringParamName : RequestParameters<@method.QueryStringParamName> 
+	public partial class @method.QueryStringParamName : RequestParameters<@method.QueryStringParamName> 
 	{
 		public override HttpMethod DefaultHttpMethod => HttpMethod.@method.HttpMethod;
 		@foreach (var param in method.Url.Params.Values)

src/Elasticsearch.Net/Domain/RequestParameters/RequestParameters.Generated.cs

@@ -0,0 +1,30 @@
+using System;
+
+namespace Elasticsearch.Net
+{
+	public partial class ForceMergeRequestParameters
+	{
+		[Obsolete("Removed in Elasticsearch 6.2. Will be removed in NEST 7.x. Calling this is a no-op.")]
+		public string OperationThreading { get; set; }
+		[Obsolete("Removed in Elasticsearch 6.2. Will be removed in NEST 7.x. Calling this is a no-op.")]
+		public bool? WaitForMerge { get; set; }
+	}
+
+	public partial class SegmentsRequestParameters
+	{
+		[Obsolete("Removed in Elasticsearch 6.2. Will be removed in NEST 7.x. Calling this is a no-op.")]
+		public string OperationThreading { get; set; }
+	}
+
+	public partial class IndicesShardStoresRequestParameters
+	{
+		[Obsolete("Removed in Elasticsearch 6.2. Will be removed in NEST 7.x. Calling this is a no-op.")]
+		public string OperationThreading { get; set; }
+	}
+
+	public partial class ValidateQueryRequestParameters
+	{
+		[Obsolete("Removed in Elasticsearch 6.2. Will be removed in NEST 7.x. Calling this is a no-op.")]
+		public string OperationThreading { get; set; }
+	}
+}

src/Elasticsearch.Net/Domain/RequestParameters/RequestParameters.Patched.cs

@@ -1,9 +1,15 @@
-namespace Nest
+using System;
+
+namespace Nest
 {
 	public partial interface ISegmentsRequest { }
 
 	public partial class SegmentsRequest { }
-	
+
 	[DescriptorFor("IndicesSegments")]
-	public partial class SegmentsDescriptor { }
+	public partial class SegmentsDescriptor
+	{
+		[Obsolete("Removed in Elasticsearch 6.2. Will be removed in NEST 7.x. Calling this is a no-op.")]
+		public SegmentsDescriptor OperationThreading(string operationThreading) => this;
+	}
 }

src/Nest/Indices/Monitoring/IndicesSegments/SegmentsRequest.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 
 namespace Nest
 {
@@ -39,5 +40,7 @@ IEnumerable<TypeName> IIndicesShardStoresRequest.Types
 		public IndicesShardStoresDescriptor Types(params TypeName[] types) =>
 			Assign(a => a.Types = types);
 
+		[Obsolete("Removed in Elasticsearch 6.2. Will be removed in NEST 7.x. Calling this is a no-op.")]
+		public IndicesShardStoresDescriptor OperationThreading(string operationThreading) => this;
 	}
 }

src/Nest/Indices/Monitoring/IndicesShardStores/IndicesShardStoresRequest.cs

@@ -1,9 +1,18 @@
-namespace Nest
+using System;
+
+namespace Nest
 {
 	public partial interface IForceMergeRequest { }
 
 	public partial class ForceMergeRequest { }
 
 	[DescriptorFor("IndicesForcemerge")]
-	public partial class ForceMergeDescriptor { }
+	public partial class ForceMergeDescriptor
+	{
+		[Obsolete("Removed in Elasticsearch 6.2. Will be removed in NEST 7.x. Calling this is a no-op.")]
+		public ForceMergeDescriptor OperationThreading(string operationThreading) => this;
+
+		[Obsolete("Removed in Elasticsearch 6.2. Will be removed in NEST 7.x. Calling this is a no-op.")]
+		public ForceMergeDescriptor WaitForMerge(bool? waitForMerge = true) => this;
+	}
 }

src/Nest/Indices/StatusManagement/ForceMerge/ForceMergeRequest.cs

@@ -3,7 +3,7 @@
 
 namespace Nest
 {
-	public partial interface IValidateQueryRequest 
+	public partial interface IValidateQueryRequest
 	{
 		[JsonProperty("query")]
 		QueryContainer Query { get; set; }
@@ -14,12 +14,12 @@ public interface IValidateQueryRequest<T> : IValidateQueryRequest
 		where T : class
 	{ }
 
-	public partial class ValidateQueryRequest 
+	public partial class ValidateQueryRequest
 	{
 		public QueryContainer Query { get; set; }
 	}
 
-	public partial class ValidateQueryRequest<T> 
+	public partial class ValidateQueryRequest<T>
 		where T : class
 	{
 		public QueryContainer Query { get; set; }
@@ -30,6 +30,10 @@ public partial class ValidateQueryDescriptor<T> where T : class
 	{
 		QueryContainer IValidateQueryRequest.Query { get; set; }
 
-		public ValidateQueryDescriptor<T> Query(Func<QueryContainerDescriptor<T>, QueryContainer> querySelector) => Assign(a => a.Query = querySelector?.Invoke(new QueryContainerDescriptor<T>()));
+		public ValidateQueryDescriptor<T> Query(Func<QueryContainerDescriptor<T>, QueryContainer> querySelector)
+			=> Assign(a => a.Query = querySelector?.Invoke(new QueryContainerDescriptor<T>()));
+
+		[Obsolete("Removed in Elasticsearch 6.2. Will be removed in NEST 7.x. Calling this is a no-op.")]
+		public ValidateQueryDescriptor<T> OperationThreading(string operationThreading) => this;
 	}
 }