Fix quota cache status assignment. (#1267)
Fix quota cache status assignment. (#1267)

Automatic merge from submit-queue.

Fix quota cache status assignment.

**What this PR does / why we need it**:Fix a bug in quota amount check in MixerClientImpl::Check().

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #1181 

**Special notes for your reviewer**:

**Release note**:

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