Automatic merge from submit-queue (batch tested with PRs 41331, 45591, 45600, 45176, 45658)
ParsePodFullName():code robustness
**What this PR does / why we need it**:
ParsePodFullName():code robustness
if pod name or namespace name is null, the function can handle it.
Meanwhile update unit test
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
51d6429a62