QQ: exclude delivery_limit from policy repair comparison.

As it cannot be updated as part of a policy when it is disabled (-1)
 it needs to be excluded from comparison

(cherry picked from commit 4d7a3fe)
(cherry picked from commit 0236d78)

Author: kjnilsson

deps/rabbit/src/rabbit_quorum_queue.erl

@@ -753,15 +753,19 @@ system_recover(quorum_queues) ->
     end.
 
 maybe_apply_policies(Q, #{config := CurrentConfig}) ->
-    NewPolicyConfig = gather_policy_config(Q, false),
+    %% delivery_limit can't be updated from a policy and thus has to be
+    %% excluded from the comparison
+    NewPolicyConfig = maps:without([delivery_limit],
+                                   gather_policy_config(Q, false)),
 
     RelevantKeys = maps:keys(NewPolicyConfig),
     CurrentPolicyConfig = maps:with(RelevantKeys, CurrentConfig),
 
     ShouldUpdate = NewPolicyConfig =/= CurrentPolicyConfig,
     case ShouldUpdate of
         true ->
-            ?LOG_DEBUG("Re-applying policies to ~ts", [rabbit_misc:rs(amqqueue:get_name(Q))]),
+            ?LOG_DEBUG("Re-applying policies for ~ts",
+                       [rabbit_misc:rs(amqqueue:get_name(Q))]),
             policy_changed(Q),
             ok;
         false -> ok