Improving HTTP WorkflowError

The content of the error response, it can be parsed according to the
response type, it is set as details

The title is set to HTTP reason phrase

Signed-off-by: fjtirado <ftirados@redhat.com>

Author: fjtirado

impl/http/src/main/java/io/serverlessworkflow/impl/executors/http/HttpModelConverter.java

@@ -31,16 +31,16 @@ default Entity<?> toEntity(WorkflowModel model) {
 
   default WorkflowError.Builder errorFromResponse(
       WorkflowError.Builder errorBuilder, Response response) {
+    errorBuilder.title(response.getStatusInfo().getReasonPhrase());
     try {
-      Object title = response.readEntity(responseType());
-      if (title != null) {
-        errorBuilder.title(title.toString());
+      Object details = response.readEntity(responseType());
+      if (details != null) {
+        errorBuilder.details(details.toString());
       }
     } catch (Exception ex) {
       LoggerFactory.getLogger(HttpModelConverter.class)
           .warn("Problem extracting error from http response", ex);
     }
-
     return errorBuilder;
   }
 }