Disable KioskErrorScreenTest.OpenCertificateConfig

Has been flaky on linux-chromeos-chrome.

TBR=achuith@chromium.org

Bug: 1116058
Change-Id: Id1f75d2118efac23db9ed07fa6957ebb6d34f649
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354227Reviewed-by: Takumi Fujimoto <takumif@chromium.org>
Commit-Queue: Takumi Fujimoto <takumif@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797740}

chrome/browser/chromeos/login/error_screen_browsertest.cc

@@ -333,7 +333,8 @@ class KioskErrorScreenTest : public MixinBasedInProcessBrowserTest {
 };
 
 // Verify that certificate manager dialog opens.
-IN_PROC_BROWSER_TEST_F(KioskErrorScreenTest, OpenCertificateConfig) {
+// Disabled for being flaky. See crbug.com/1116058.
+IN_PROC_BROWSER_TEST_F(KioskErrorScreenTest, DISABLED_OpenCertificateConfig) {
   apps_loaded_waiter()->Wait();
   EXPECT_TRUE(ash::LoginScreenTestApi::LaunchApp(kTestKioskAppId));