No setPeerResult() when peer is empty (#1461)
No setPeerResult() when peer is empty (#1461)

Automatic merge from submit-queue.

No setPeerResult() when peer is empty

**What this PR does / why we need it**: when peer is empty in Istio authn policy, do not setPeerResult()

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #1460

**Special notes for your reviewer**:

**Release note**:

```release-note
```
istio/proxy,istio/proxy,lizan/proxy,istio/proxy,lizan/proxy,lizan/proxy,lizan/proxy,istio/proxy