[CE->EE] Fix saml related spec spec/features/login_spec.rb:156

lib/gitlab/saml/user.rb

@@ -32,6 +32,15 @@ module Gitlab
 
       protected
 
+      def find_by_email
+        if auth_hash.has_attribute?(:email)
+          user = ::User.find_by(email: auth_hash.email.downcase)
+          user.identities.new(extern_uid: auth_hash.uid, provider: auth_hash.provider) if user
+          user
+        end
+      end
+
+
       def auto_link_saml_user?
         Gitlab.config.omniauth.auto_link_saml_user
       end