Shutdown handling for all pooled Redis clients

[MarcusSorealheis]

Description

Removes client leak driving OOMs.

Type of change

Please delete options that aren't relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to
  not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please also list any relevant details for your test configuration

Checklist

• Updated documentation if needed
• Tests added/amended
• bazel test //... passes locally
• PR is contained in a single commit, using git amend see some docs

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This change is 

[MarcusSorealheis]

even if this additon solves the problem in your testing @amankrx I will still need to move a few methods in here to the test directory. I put this up to ensure it works so you can test given timezone differences.