Fix sonar bug

Author: oliemansm

graphql-java-kickstart/src/main/java/graphql/kickstart/execution/GraphQLInvoker.java

@@ -20,7 +20,7 @@ public class GraphQLInvoker {
 
   private final GraphQLBuilder graphQLBuilder;
   private final BatchedDataLoaderGraphQLBuilder batchedDataLoaderGraphQLBuilder;
-  private GraphQLInvokerProxy proxy = GraphQL::executeAsync;
+  private final GraphQLInvokerProxy proxy = GraphQL::executeAsync;
 
   public CompletableFuture<ExecutionResult> executeAsync(
       GraphQLSingleInvocationInput invocationInput) {

graphql-java-kickstart/src/main/java/graphql/kickstart/execution/GraphQLInvokerSubjectProxy.java

@@ -17,17 +17,16 @@ public CompletableFuture<ExecutionResult> executeAsync(GraphQL graphQL,
     GraphQLContext context = (GraphQLContext) executionInput.getContext();
     if (Subject.getSubject(AccessController.getContext()) == null && context.getSubject()
         .isPresent()) {
-      return Subject
-          .doAs(context.getSubject().get(),
-              (PrivilegedAction<CompletableFuture<ExecutionResult>>) () -> {
-                try {
-                  return graphQL.executeAsync(executionInput);
-                } catch (Exception e) {
-                  throw new RuntimeException(e);
-                }
-              });
+      return context.getSubject()
+          .map(it -> Subject.doAs(it, doAction(graphQL, executionInput)))
+          .orElseGet(() -> graphQL.executeAsync(executionInput));
     }
     return graphQL.executeAsync(executionInput);
   }
 
+  private PrivilegedAction<CompletableFuture<ExecutionResult>> doAction(GraphQL graphQL,
+      ExecutionInput executionInput) {
+    return () -> graphQL.executeAsync(executionInput);
+  }
+
 }