Fix broken job link.

Now simply use the URL `../[build]/[url]` to navigate to the latest results.
Fixes:
- https://github.com/jenkinsci/code-coverage-api-plugin/issues/227
- https://github.com/jenkinsci/code-coverage-api-plugin/issues/231

Author: uhafner

src/main/java/io/jenkins/plugins/util/JobAction.java

@@ -64,8 +64,9 @@ public void doIndex(final StaplerRequest request, final StaplerResponse response
         Optional<T> action = getLatestAction();
         if (action.isPresent()) {
             T buildAction = action.get();
-            response.sendRedirect2(String.format("../../../%s%s",
-                    buildAction.getOwner().getUrl(), buildAction.getUrlName()));
+            response.sendRedirect2(String.format("../%d/%s",
+                    buildAction.getOwner().getNumber(),
+                    buildAction.getUrlName()));
         }
     }