Use existing needle for dismissing KDE update notification

@lruzicka added this to the KDE app tests in 71c4e273, but there
was no need for a new needle as I'd already done the same thing
in the desktop updates tests; let's just use the same needle.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

needles/kde/apps/kde_updates_available.json

@@ -1,15 +0,0 @@
-{
-  "properties": [],
-  "tags": [
-    "kde_updates_available"
-  ],
-  "area": [
-    {
-      "xpos": 957,
-      "ypos": 666,
-      "width": 42,
-      "height": 41,
-      "type": "match"
-    }
-  ]
-}

needles/kde/apps/kde_updates_available_close.json

@@ -1,15 +0,0 @@
-{
-  "properties": [],
-  "tags": [
-    "kde_updates_available_close"
-  ],
-  "area": [
-    {
-      "xpos": 986,
-      "ypos": 644,
-      "width": 14,
-      "height": 15,
-      "type": "match"
-    }
-  ]
-}

tests/apps_startstop/kde/aasetting.pm

@@ -34,8 +34,8 @@ sub run {
     # to get rid of that, because it can be later displayed
     # over some applications preventing OpenQA to find
     # correct buttons, which creates false positives.
-    if (check_screen('kde_updates_available')) {
-        assert_and_click "kde_updates_available_close";
+    if (check_screen "desktop_update_notification_popup", 10) {
+        assert_and_click "desktop_update_notification_popup";
     }
 }