RedisDbAction() was not originally here

[aschenzle]

This change was introduced with my DynamoDB changes as I thought it was missing by mistake. Tests passed anyway so if this wasn't actually a bug, a test should be introduced.

Originally posted by @jgaleotti in #1746 (comment)

[jgaleotti]

Hi @aschenzle , thanks for pointing out this defect.
We leave the issue tracking for issues reported by external user of EvoMaster.
We internally communicate among EvoMaster's developers to report problems that require attention.
Having said this, please close this Issue :)