Fixed Issues in Cloudera Manager 7.4.1

Fixed issues in Cloudera Manager 7.4.1

OPSAPS-59562, OPSAPS-59229: SMM YAML configuration uses plain-text passwords
Previously, Streams Messaging Manager passwords were stored in its configuration file as plain-text. The passwords are now assigned as environment variables.
OPSAPS-59555: HBase validation "Regions In Transition" should be disabled for backup master
Cloudera Manager was trying to execute "Regions in Transition" validations for backup (standby) HBase Masters in highly available deployments. This validation was always unsuccessful, as the related metrics are exposed only by the active HBase Master. This validation is now disabled for the backup HBase Master.