Fix for issue #5777 - java/jersey2 ApiClient.invokeAPI doesn´t close the Response object (#5782)

* Update ApiClient.mustache

Fix for issue #5777

* Update ApiClient.mustache

* Create ApiClient.mustache

* Run java-petstore-jersey2.sh

modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache

@@ -682,8 +682,9 @@ public class ApiClient {
 
     Entity<?> entity = serialize(body, formParams, contentType);
 
-    Response response;
+    Response response = null;
 
+    try {
       if ("GET".equals(method)) {
         response = invocationBuilder.get();
       } else if ("POST".equals(method)) {
@@ -725,6 +726,13 @@ public class ApiClient {
           buildResponseHeaders(response),
           respBody);
       }
+    } finally {
+      try {
+        response.close();
+      } catch (Exception e) {
+        // it's not critical, since the response object is local in method invokeAPI; that's fine, just continue
+      }
+    }
   }
 
   /**

samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiClient.java

@@ -671,8 +671,9 @@ public class ApiClient {
 
     Entity<?> entity = serialize(body, formParams, contentType);
 
-    Response response;
+    Response response = null;
 
+    try {
       if ("GET".equals(method)) {
         response = invocationBuilder.get();
       } else if ("POST".equals(method)) {
@@ -714,6 +715,13 @@ public class ApiClient {
           buildResponseHeaders(response),
           respBody);
       }
+    } finally {
+      try {
+        response.close();
+      } catch (Exception e) {
+        // it's not critical, since the response object is local in method invokeAPI; that's fine, just continue
+      }
+    }
   }
 
   /**