Fixed issues in Cruise Control

Review the list of Cruise Control issues that are resolved in Cloudera Runtime 7.1.9.

OPSAPS-68148: Cruise Control rack aware goal upgrade handler

As Cruise Control automatically overrides all occurrences of the deprecated RackAwareGoal with RackAwareDistributionGoal during upgrade, the customized values of the Cruise Control goals will remain the same and there is no need to manually provide the values after an upgrade.

CDPD-47616: Unable to initiate rebalance, number of valid windows (NumValidWindows) is zero

This issue has been fixed as the Cloudera Manager Metrics Reporter is deprecated from Cruise Control.

OPSAPS-66432: Cruise Control does not start with Python 3

This issue has been fixed and Cruise Control will start successfully with Python 3.