Update the sonar-web pom with correct config for javadoc and sources

server/sonar-web/pom.xml

@@ -180,6 +180,10 @@
                 </overlay>
               </overlays>
             </configuration>
+          </plugin>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-jar-plugin</artifactId>
             <executions>
               <execution>
                 <id>empty-javadoc-jar</id>