Optionally check keystore and truststore file when SASL_SSL protocol used

[morazow]

Situation

At the moment, we require keystore and truststore JKS files stored in BucketFS bucket when using security protocols SSL
and SASL_SSL.

For SASL_SSL this should be optional since JAAS configuration can be also used.

Acceptance Criteria

• Skips keystore and truststore location checks when using SASL_SSL protocol.
• Sets locations files if they are provided.

[millin]

Hello @morazow!
There seems to be some mistake.
From now when SECURITY_PROTOCOL = 'SASL_SSL' keystore and truststore files are ignored and not passed to kafka parameters.

[morazow]

Hey @millin,

Thanks a lot! Indeed we forgot to set the location files after validation.

I am fixing and releasing a new version.

Thanks for your feedback!