[chart/redis-ha][REQUEST] fullnameOverride adn nameOverride

[lukastopiarz]

Is your feature request related to a problem? Please describe. Missing fullnameOverride and nameOverride variables in values and code in templates. https://stackoverflow.com/questions/63838705/what-is-the-difference-between-fullnameoverride-and-nameoverride-in-helm https://github.com/helm/helm/blob/e007c900ce5f2233c8583565d5ba1b0433b1a213/pkg/chartutil/create.go#L433-L449

Describe the solution you'd like Add fullnameOverride and nameOverride variables and corresponding template/helper code.