use springboot managed resttemplate (#202)

Adopt Spring Boot managed RestTemplate so distributed tracing (traceId) is automatically propagated through all REST calls

Signed-off-by: Abdelsalem <[email protected]>
Co-authored-by: benrejebmoh <[email protected]>

Author: AbdelHedhili

src/main/java/org/gridsuite/securityanalysis/server/RestTemplateConfig.java

@@ -13,6 +13,7 @@
 import com.powsybl.contingency.json.ContingencyJsonModule;
 import com.powsybl.loadflow.json.LoadFlowParametersJsonModule;
 import com.powsybl.security.json.SecurityAnalysisJsonModule;
+import org.springframework.boot.web.client.RestTemplateBuilder;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.http.converter.HttpMessageConverter;
@@ -24,8 +25,8 @@
 public class RestTemplateConfig {
 
     @Bean
-    public RestTemplate restTemplate() {
-        final RestTemplate restTemplate = new RestTemplate();
+    public RestTemplate restTemplate(RestTemplateBuilder builder) {
+        final RestTemplate restTemplate = builder.build();
 
         //find and replace Jackson message converter with our own
         for (int i = 0; i < restTemplate.getMessageConverters().size(); i++) {