Update ThrottleJobPropertyTest.java

Author: janfaracik

src/test/java/hudson/plugins/throttleconcurrents/ThrottleJobPropertyTest.java

@@ -427,7 +427,7 @@ public void clearConfiguredCategories() throws Exception {
         WebClientUtil.waitForJSExec(page.getWebClient());
         HtmlForm config = page.getFormByName("config");
         List<HtmlButton> deleteButtons =
-                config.getByXPath("//div[text()='Multi-Project Throttle Categories']/..//button[@title='Delete' or normalize-space(string(.)) = 'Delete']");
+                config.getByXPath("//div[text()='Multi-Project Throttle Categories']/../div//button[@title='Delete' or normalize-space(string(.)) = 'Delete']");
         assertEquals(1, deleteButtons.size());
         deleteButtons.get(0).click();
         WebClientUtil.waitForJSExec(page.getWebClient());