Remove unused variables in IBM MQ scaler

[rickbrouwer]

Proposal

This issue involves cleaning up the IBM MQ scaler code and ensuring the documentation is accurate.

The queueManager parameter is currently checked to see if it's filled, but it's not used elsewhere in the code. This unused code will be removed.

Additionally, the parameter tlsDisabled is used in the code in relation to CreateHTTPClient. However, all other scalers use the parameter unsafeSsl. To maintain consistency between other scalers, we are making changes, as unsafeSsl already handles this functionality. tls will still be supported. My proposal is to tag the tls parameter with deprecated=use unsafeSsl instead in version 2.18 and remove the deprecated code.

The current documentation states that the default queueDepth is 5, while the code default is 20. The documentation will be updated to reflect the correct default value of 20, aligning it with the code.

Finally, there will be some minor adjustments to the documentation.

Use-Case

You are required to specify a queueManager, while it is not used. That is unnecessary configuration.

tlsDisabled has never worked. The code looks at tls and it will be therefore always false, when you followed the documentation. But because the code now also contains unsafeSsl, we want to use this standard because other scalers use unsafeSsl for the same functionality.

Is this a feature you are interested in implementing yourself?

Yes

Anything else?

No response