add an 'esc' to krfb startstop test to deal with a dialog

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

tests/apps_startstop/kde/krfb.pm

@@ -13,6 +13,8 @@ sub run {
     # Check that it is started
     assert_screen 'krfb_runs', timeout => 60;
     wait_still_screen(3);
+    # close the "remote control requested" window if shown
+    send_key "esc";
     # Close the application
     quit_with_shortcut();
 }