Elasticsearch credentials are stored encrypted in Datastore
But not in the Redis cache, they are stored there as plain text
Redis cache allow unauthenticated calls within VPC which is a potentially security breach. Elasticsearch credentials must also be encrypted in Redis.
Refactor kms client to use single implementation from core-lib-gcp.
Dependencies refactoring (clean up pom file, consolidate last libs versions in core-lib-gcp).