Fix usage of obsolete method

Author: joemcbride

src/GraphQL.Tests/Execution/SchemaLifetimeTests.cs

@@ -21,7 +21,11 @@ public async Task ExecutingThenDisposing_DoesNotThrowException()
             var executer = new DocumentExecuter();
             var schema = new Schema();
 
-            await executer.ExecuteAsync(schema, null, "{noop}", null).ConfigureAwait(false);
+            await executer.ExecuteAsync(_ =>
+            {
+                _.Schema = schema;
+                _.Query = "{noop}";
+            }).ConfigureAwait(false);
 
             Should.NotThrow(() => schema.Dispose());
         }

src/GraphQL.Tests/Introspection/SchemaIntrospectionTests.cs

@@ -12,7 +12,12 @@ public class SchemaIntrospectionTests
         public void validate_core_schema()
         {
             var documentExecuter = new DocumentExecuter();
-            var executionResult = documentExecuter.ExecuteAsync(new Schema(), null, SchemaIntrospection.IntrospectionQuery, null).Result;
+            var executionResult = documentExecuter.ExecuteAsync(_ =>
+            {
+                _.Schema = new Schema();
+                _.Query = SchemaIntrospection.IntrospectionQuery;
+            }).GetAwaiter().GetResult();
+
             var json = new DocumentWriter(true).Write(executionResult.Data);
 
             ShouldBe(json, IntrospectionResult.Data);
@@ -22,7 +27,12 @@ public void validate_core_schema()
         public void validate_non_null_schema()
         {
             var documentExecuter = new DocumentExecuter();
-            var executionResult = documentExecuter.ExecuteAsync(new TestSchema(), null, InputObjectBugQuery, null).Result;
+            var executionResult = documentExecuter.ExecuteAsync(_ =>
+            {
+                _.Schema = new TestSchema();
+                _.Query = InputObjectBugQuery;
+            }).GetAwaiter().GetResult();
+
             var json = new DocumentWriter(true).Write(executionResult.Data);
             executionResult.Errors.ShouldBeNull();
 

src/GraphQL/Execution/DocumentExecuter.cs

@@ -19,7 +19,7 @@ namespace GraphQL
 {
     public interface IDocumentExecuter
     {
-        [Obsolete("This method will be removed in a future version.")]
+        [Obsolete("This method will be removed in a future version.  Use ExecutionOptions parameter.")]
         Task<ExecutionResult> ExecuteAsync(
             ISchema schema,
             object root,
@@ -52,6 +52,7 @@ public DocumentExecuter(IDocumentBuilder documentBuilder, IDocumentValidator doc
             _complexityAnalyzer = complexityAnalyzer;
         }
 
+        [Obsolete("This method will be removed in a future version.  Use ExecutionOptions parameter.")]
         public Task<ExecutionResult> ExecuteAsync(
             ISchema schema,
             object root,