DL-11458 - removed http-caching-client

[stephen-oppong-beduh]

DL-11458 - removed http-caching-client

The service already uses hmrc-mongo, so just moved the CacheMap class into the service.

Checklist

• [ ] I've made every effort to commit high quality, clean code and I have executed relevant static analyses to be sure
• [ ] I've included appropriate tests with any code I've added (Unit, Integration, Acceptance etc.)
• [ ] I've executed the acceptance test pack locally to ensure there are no functional regressions
• [ ] I've added my code using logical, atomic commits, squashing as appropriate - including the JIRA issue number in the commit message
• [ ] I've run a dependency check to ensure all dependencies are up to date

[platops-pr-bot]

• SBT can be updated to 1.7.2 in project/build.properties

[platops-pr-bot]

• SBT can be updated to 1.7.2 in project/build.properties

[platops-pr-bot]

• SBT can be updated to 1.7.2 in project/build.properties