**What type of PR is this?**
/kind cleanup

**What this PR does / why we need it**:
Fix typos for stats_provider_test.go

**Which issue(s) this PR fixes** *(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged)*:

**Special notes for your reviewer**:

**Release note**:
```
NONE
```