test: Ignore session timeout messages in TestIPA.testQualifiedUsers

The test idles on the login page for more than the 60s authorize
timeout. When running cockpit-session via unix socket, this causes some
unsightly "session timed out during authentication" messages. This ought
to be handled better in cockpit-ws, but for the time being ignore these
messages.

test/verify/check-system-realms

@@ -275,6 +275,10 @@ class CommonTests:
         self.allow_journal_messages(".*No authentication agent found.*")
         # sometimes polling for info and joining a domain creates this noise
         self.allow_journal_messages('.*org.freedesktop.DBus.Error.Spawn.ChildExited.*')
+        # HACK: idling too long on the login page in Negotiate cockpit-session while polling for stuff
+        # (this should be fixed properly in cockpit-ws)
+        self.allow_journal_messages('.*session timed out during authentication')
+        self.allow_journal_messages('.*authentication timed out')
 
     def testUnqualifiedUsers(self):
         m = self.machine