Initialize response code in ReportInfo to 500 (#1132)
Initialize response code in ReportInfo to 500 (#1132)

Automatic merge from submit-queue.

Initialize response code in ReportInfo to 500

**What this PR does / why we need it**:

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #1126 

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```
istio/proxy,istio/proxy,istio/proxy,lizan/proxy,lizan/proxy,lizan/proxy,istio/proxy,lizan/proxy