ReliableTopic totalPublishes metric is always 0

[erosb]

This was reported by a community user at: https://groups.google.com/g/hazelcast/c/AaNdgDamGtc

Describe the bug

The reliableTopic.totalPublishes metric is always 0.

Expected behavior
The reliableTopic.totalPublishes should be incremented on each publish, just like topic.totalPublishes

To Reproduce

Steps to reproduce the behavior:

1. Start a HZ 4.2.2 (or 5.0-BETA-2) member with docker run -p 5701:5701 hazelcast/hazelcast:4.2.2
2. Start MC with java -Dhazelcast.mc.prometheusExporter.enabled=true -Dhazelcast.mc.license='<any-valid-license>' -jar target/hazelcast-management-center-5.0-SNAPSHOT.jar
3. Start running the following client snippet:

        HazelcastInstance client = HazelcastClient.newHazelcastClient();
        ITopic<String> reliableTopic = client.getReliableTopic("myRB");
        ITopic<String> topic = client.getTopic("my-topic");
        for (int i = 0; ; ++i) {
            Thread.sleep(50);
            reliableTopic.publish("my message " + i);
            topic.publish("my message " + i);
        }

4. run curl http://localhost:8080/metrics

Expected output: the hz_reliableTopic_totalPublishes{mc_cluster="dev",mc_member="172.17.0.2:5701",name="myRB",unit="COUNT",} metric has a value higher than 0
Actual output: hz_reliableTopic_totalPublishes{mc_cluster="dev",mc_member="172.17.0.2:5701",name="myRB",unit="COUNT",} is 0.0 in the metric dump

Additional context

It is reproducible with

• HZ 4.2.2 and MC 4.2021.6
• HZ 4.2.2 and MC 5.0-SNAPSHOT
• HZ 5.0-BETA-2 and MC 5.0-SNAPSHOT