Fix boolean endpoints so they can have a request body (#341) (#342)

Co-authored-by: Sylvain Wallez <[email protected]>

Author: github-actions[bot]

java-client/src/main/java/co/elastic/clients/transport/endpoints/BooleanEndpoint.java

@@ -33,10 +33,10 @@ public BooleanEndpoint(
         Function<RequestT,
             Map<String, String>> queryParameters,
         Function<RequestT, Map<String, String>> headers,
-        boolean hasRequestBody, // always false
+        boolean hasRequestBody,
         JsonpDeserializer<?> responseParser // always null
     ) {
-        super(id, method, requestUrl, queryParameters, headers, false, null);
+        super(id, method, requestUrl, queryParameters, headers, hasRequestBody, null);
     }
 
     @Override

java-client/src/test/java/co/elastic/clients/transport/endpoints/BooleanEndpointTest.java

@@ -0,0 +1,34 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package co.elastic.clients.transport.endpoints;
+
+import co.elastic.clients.elasticsearch.core.ExistsRequest;
+import co.elastic.clients.elasticsearch.logstash.PutPipelineRequest;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class BooleanEndpointTest extends Assertions {
+
+    @Test
+    public void testHasRequestBody() {
+        assertFalse(ExistsRequest._ENDPOINT.hasRequestBody());
+        assertTrue(PutPipelineRequest._ENDPOINT.hasRequestBody());
+    }
+}