Support multiple queues at the IBMMQ scaler

[rickbrouwer]

Changed the queueName parameter so that it accepts multiple queues (comma (,) separated). The code is is changed so it's request the current depth per queue and only use the current depth from the queue with the most messages. Because it's accepts multiple queues, queueNames will be also supported.

Also added extra check for authentication error. When an incorrect password is given the error message is error inspecting IBM MQ queue depth: failed to parse response from REST call. The reason is a bit unclear. That's why I added a better error message error inspecting IBM MQ queue depth: authentication failed: incorrect username or password.

Checklist

• I have verified that my change is according to the deprecations & breaking changes policy
• Tests have been added
• Changelog has been updated and is aligned with our changelog requirements
• A PR is opened to update the documentation on (repo) (if applicable)
• Commits are signed with Developer Certificate of Origin (DCO - learn more)

Fixes #6181
Docs: kedacore/keda-docs#1473

[JorTurFer]

I see the use case of this feature, but IMHO we should expose the aggregation algorithm if we allow multiple queries in the same trigger. If you check the RabbitMQ trigger, it exposes the aggregation as parameter (min, max, sum).
WDTY @zroubalik @wozniakjan

[rickbrouwer]

I see the use case of this feature, but IMHO we should expose the aggregation algorithm if we allow multiple queries in the same trigger. If you check the RabbitMQ trigger, it exposes the aggregation as parameter (min, max, sum). WDTY @zroubalik @wozniakjan

I totally agree with you. That is a nicer setup. I will make this adjustment and add it.

[JorTurFer]

LGTM! PTAL @zbynek @wozniakjan

[JorTurFer]

/run-e2e ibm
Update: You can check the progress here

[zbynek]

PTAL @zbynek

I guess you meant @zroubalik

[JorTurFer]

PTAL @zbynek

I guess you meant @zroubalik

lol, sorry :( yes... I meant @zroubalik

[zroubalik]

PTAL @zbynek

I guess you meant @zroubalik

lol, sorry :( yes... I meant @zroubalik

I wish I had that GH handle :))

[zroubalik]

LGTM, thanks!

[JorTurFer]

/run-e2e ibm
Update: You can check the progress here