Bug Fix: Redis Versioning

[phutelmyer]

Describe the change
The dependency go-redis for strelka-frontend and strelka-manager has recently been updated, which caused issues in compilation of the strelka cluster (redis/go-redis#1534). A fix has been implemented to use a previous release of go-redis (v8). While this should act as a fix, it should also be temporary until an alternative solution has been identified or go-redis fixes this issue.

Related Issue: #142

Describe testing procedures

• Destroyed and rebuilt all strelka images to identify additional errors.
• Ran multiple scanners to identify additional errors and review output changes.

Sample output
No output changes.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of and tested my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings