[CI] Restore token critical error filter

It was removed as part of improvements in [1]. But it seems it's
a different type/class of errors and should still be filtered
out here.
This time for all the services to avoid extra copies.

[1] Ie6a95c3ca84df82ca8463cf76054e125cb1ffff1

Change-Id: If7c5b938dc7417831a90f360d6e3655d1ad4084e

tests/check-logs.sh

@@ -31,13 +31,14 @@ function filter_out_expected_critical {
     */neutron-server.log)
         # Sometimes we see this during shutdown (upgrade).
         # See: https://bugs.launchpad.net/neutron/+bug/1863579
-        grep -v "WSREP has not yet prepared node for application use"
+        grep -v "WSREP has not yet prepared node for application use" |
+        grep -v "Failed to fetch token data from identity server"
         ;;
     *)
-        # We have to provide some pass-through consumer to avoid:
-        #   grep: write error: Broken pipe
-        # from check_openstack_log_file_for_level
-        cat
+        # Sometimes we see this during upgrades of Keystone.
+        # Usually in Placement but also in Neutron and Nova.
+        # Especially in AIO.
+        grep -v "Failed to fetch token data from identity server"
         ;;
     esac
 }