A simpler does_policy_configure_cmq impl for maps

Suggested by @the-mikedavis

Co-authored-by: Michael Davis <[email protected]>
(cherry picked from commit 7a8d873)

Author: 2 people

deps/rabbit/src/rabbit_mirror_queue_misc.erl

@@ -1011,7 +1011,7 @@ has_ha_policies(Policies) ->
       end, Policies).
 
 does_policy_configure_cmq(Map) when is_map(Map) ->
-    lists:keymember(<<"ha-mode">>, 1, rabbit_data_coercion:to_proplist(Map));
+    is_map_key(<<"ha-mode">>, Map);
 does_policy_configure_cmq(KeyList) when is_list(KeyList) ->
     lists:keymember(<<"ha-mode">>, 1, KeyList).