Updated Zookeeper timeout from 6000ms to 18000ms as per defaults in 5…

[JumaX]

….4.0 release.

Description

Updated zookeeper.connection.timeout.ms from 6000ms to 18000ms as per the new default with the 5.4.0 release of CP.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Deployed a full cluster on AWS on RHEL 7 to confirm change takes affect.

Test Configuration:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

[JumaX]

@domenicbove please review when you have a moment.

[domenicbove]

Is this what we are taking as the source of truth for the prop, or is it written elsewhere: https://cwiki.apache.org/confluence/display/KAFKA/KIP-537%3A+Increase+default+zookeeper+session+timeout

Looks fine