Test: metrics_SUITE queue_idemp wait for queue metrics

(cherry picked from commit 0df71d5)

Author: dcorbacho

deps/rabbit/test/metrics_SUITE.erl

@@ -187,6 +187,10 @@ queue_metric_idemp(Config, {N, R}) ->
               Queue
           end || _ <- lists:seq(1, N)],
 
+    ?awaitMatch(N, length(read_table_rpc(Config, queue_metrics)),
+                30000),
+    ?awaitMatch(N, length(read_table_rpc(Config, queue_coarse_metrics)),
+                30000),
     Table = [ Pid || {Pid, _, _} <- read_table_rpc(Config, queue_metrics)],
     Table2 = [ Pid || {Pid, _, _} <- read_table_rpc(Config, queue_coarse_metrics)],
     % refresh stats 'R' times
@@ -196,12 +200,16 @@ queue_metric_idemp(Config, {N, R}) ->
          gen_server2:call(Pid, flush)
       end|| {Pid, _, _} <- ChanTable ] || _ <- lists:seq(1, R)],
     force_metric_gc(Config),
+    ?awaitMatch(N, length(read_table_rpc(Config, queue_metrics)),
+                30000),
+    ?awaitMatch(N, length(read_table_rpc(Config, queue_coarse_metrics)),
+                30000),
     TableAfter = [ Pid || {Pid, _, _} <- read_table_rpc(Config,  queue_metrics)],
     TableAfter2 = [ Pid || {Pid, _, _} <- read_table_rpc(Config, queue_coarse_metrics)],
     [ delete_queue(Chan, Q) || Q <- Queues],
     rabbit_ct_client_helpers:close_connection(Conn),
-    (Table2 == TableAfter2) and (Table == TableAfter) and
-    (N == length(Table)) and (N == length(TableAfter)).
+    (lists:sort(Table2) == lists:sort(TableAfter2))
+        and (lists:sort(Table) == lists:sort(TableAfter)).
 
 connection_metric_count(Config, Ops) ->
     add_rem_counter(Config, Ops,