Support password protected sentinel instances when using Sentinel Redis (Redis HA for backend components)

When no sentinels are configured the environment variables CONFIG_REDIS_PROXY and CONFIG_QUEUES_MASTER_NAME can use URLs and support password protected databases, for example:

CONFIG_REDIS_PROXY =redis://user:password@server:port/database

then connection is established with the password protected redis instance.

When sentinels are configured the password must be set in sentinels configuration and use the sentinel group name instead:

CONFIG_REDIS_PROXY=redis://master_group

The request is to support password protected sentinels instances.