Revert "maven-surefire-plugin" to "v.3.2.5", as the Jenkins instance,…

… used to build and generate the release, has an older version of maven, which is not supported by newer versions of this plugin.

pom.xml

@@ -62,7 +62,8 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
-        <version>3.5.2</version>
+        <version>3.2.5</version>
+        <!-- DO NOT UPDATE until the Jenkins-instance has its "maven" package updated. Otherwise, the release will not be able to be deployed on Nexus repository. -->
         <configuration>
           <!--<excludes>
             <exclude>some test to exclude here</exclude>

src/main/java/eu/openaire/publications_retriever/util/url/DataForOutput.java

@@ -18,9 +18,7 @@
 public class DataForOutput
 {
     private String urlId;
-    private String sourceUrl;
-	private String pageUrl;
-    private String docOrDatasetUrl;
+    private String sourceUrl, pageUrl, docOrDatasetUrl;
 	private String wasUrlChecked, wasUrlValid, wasDocumentOrDatasetAccessible, wasDirectLink, couldRetry;
 	private String hash;
 	private Long size;