mqtrigger debugging steps

[viveksinghggits]

mqtrigger is not able to pick the messages from the configured Kafka Cluster, even though the Kafka Cluster is up and running fine and other clients can produce the message to that Kafka Cluster.
We dont see any logs in that pod also so it becomes increasingly tough to debug the mqtrigger.
We should have some steps documented in this page that explain how can we debug if mqtrigger is not able to pick the Kafka messages and call fission function.

[sanketsudake]

@blackfly19 please consider this for update in keda mqtrigger kafka documentation.

[blackfly19]

Sure I'll add it to the documentation.