Release Notes for Confluent Kafka Service version 2.5.0-4.1.2

Updates

Update confluent-kafka base tech to version 4.1.2, See Confluent Platform 4.1.2 release notes for more details
Update dcos-coommons sdk version to 0.55.2
Update Zookeeper Client version to 3.4.13
Switched to file-based secret

Number of open file descriptors is now configurable via the RLIMIT_NOFILE_SOFT and RLIMIT_NOFILE_HARD configuration parameters.
Timeouts for readiness checks are now configurable via the READINESS_CHECK_INTERVAL, READINESS_CHECK_DELAY and READINESS_CHECK_TIMEOUT configuration parameters.