Add support for custom config groups in cluster update #153
Description
We can configure custom config groups for new clusters in CDP Base but we cannot create new services with custom config groups in existing CDP Base clusters
The services templates used when creating cluster and updating cluster are different :
Behaviour when updating cluster: On new services, it will apply default config group to all hosts
Excepted behaviour: On new services, custom configuration groups should be applied
Exemple of use case: IHAC on CDH 6, upgrading to CDP 7 with this ansible collection. Their clusters have multiple configuration groups on hive for HMS, HS2, and Gateway roles. When upgrading, Hive on Tez is created as a new service with all instances with the default configuration group