Merge pull request #12798 from rabbitmq/mergify/bp/v4.0.x/pr-12797

GET /api/overview: format cluster and node tag lists as maps (backport #12797)

Author: michaelklishin

deps/rabbitmq_management/src/rabbit_mgmt_wm_overview.erl

@@ -185,11 +185,13 @@ transform_retention_intervals([{MaxAgeInSeconds, _}|Rest], Acc) ->
     transform_retention_intervals(Rest, [AccVal|Acc]).
 
 cluster_tags() ->
-    case rabbit_runtime_parameters:value_global(cluster_tags) of
+    Val = case rabbit_runtime_parameters:value_global(cluster_tags) of
         not_found ->
             [];
         Tags -> Tags
-    end.
+    end,
+    rabbit_data_coercion:to_map(Val).
 
 node_tags() ->
-    application:get_env(rabbit, node_tags, []).
+    Val = application:get_env(rabbit, node_tags, []),
+    rabbit_data_coercion:to_map(Val).