Module description contains placeholder content

Problem/Motivation

redis.info.yml contains placeholder content as the description.
description: Provide a module placeholder, for using as dependency for module that needs Redis.

Steps to reproduce

Check redis.info.yml file.

Proposed resolution

Update the description to a more appropriate text.

Suggestion: Provides integration with the Redis non-persistent caching layer.

Remaining tasks

Update description in redis.info.yml file.

User interface changes

None

API changes

None

Data model changes