QRA-402 Need to expose the Unique statsd call to use within our library for other work on NLVX

Signed-off-by: Ian Douglas <ian.douglas@iandouglas.com>

## Summary:
The Unique call wasn't exposed, and we need it on NLVX.

## PR - Merge Checklist:
-- Verify:
- [x] CHANGELOG updated
- [x] ALL tests have passed
- [ ] Code Review is done
- [ ] Acceptance criteria verified by QE
- [ ] End to end testing completed by QE

## Dependencies:
None

## Risks:
None

## Rollback:
revert merge