Quarantining test ee group saml

Added a quarantine tag to the suite since all three tests
have been failing and need to be repaired.

qa/qa/specs/features/browser_ui/1_manage/ee_group/group_saml_sso_spec.rb

@@ -2,7 +2,8 @@
 
 module QA
   context 'Manage', :orchestrated, :group_saml do
-    describe 'Group SAML SSO' do
+    # Failure issue: https://gitlab.com/gitlab-org/quality/staging/issues/60
+    describe 'Group SAML SSO', :quarantine do
       include Support::Api
 
       before(:all) do