[bitnami/redis] Fix zombie processes in readiness/liveness check

[javsalgar]

Description of the change

Change the signal of the liveness and readiness check. Also needed to perform several linting changes so our automated scripts would allow pushing the change.

Benefits

Possible drawbacks

Applicable issues

• fixes zombie processes caused by health checks #2441

Additional information

Checklist

• Chart version bumped in Chart.yaml according to semver.
• Variables are documented in the README.md
• Title of the PR starts with chart name (e.g. [bitnami/chart])
• If the chart contains a values-production.yaml apart from values.yaml, ensure that you implement the changes in both files

⚠️ Keep in mind that if you want to make changes to the kubeapps chart, please implement them in the kubeapps repository. This is only a synchronized mirror.

[miguelaeh]

LGTM!!

[bitnami-bot]

I have just updated the bitnami images with the latest known immutable tags:

• "docker.io/bitnami/redis:5.0.9-debian-10-r4"
• "docker.io/bitnami/redis-exporter:1.5.3-debian-10-r21"
• "docker.io/bitnami/redis-sentinel:5.0.9-debian-10-r2"
• "docker.io/bitnami/minideb:buster"
• "docker.io/bitnami/minideb:buster"

[carrodher]

Changes already in the repo:

▶ helm search repo bitnami/redis
NAME                 	CHART VERSION	APP VERSION	DESCRIPTION
bitnami/redis        	10.6.12      	5.0.9      	Open source, advanced key-value store. It is of...

Merging it...