Automatic merge from submit-queue (batch tested with PRs 62209, 62281, 61792, 62285, 61973). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Add ingress e2e test for multiple TLS (SNI) support
**What this PR does / why we need it**:
Add an e2e test for multiple TLS support in ingress-gce.
**Release note**:
```release-note
None
```
/assign @MrHohn
/hold