Inconsistency between consumer and producer config

[gvdwiele]

For the consumer, the KafkaTriggerAttribute parameter SslKeyPassword is being resolved using the ResolveSecureSetting when building the consumer. So it support the % syntax to get the SslKeyPassword value from the appsettings json.
See KafkaTriggerAttributeBindingProvider.cs line 105.

For the producer (output binding), the parameter is passed as-is without resolving the % syntax. So the password is not loaded from the configuration. See KafkaProducerFactory.cs line 131.

[jainharsh98]

Thanks for posting the issue @gvdwiele. Can you please create a PR to fix this? For reference similar changes have been made for other Ssl attributes here #430.