Automatic merge from submit-queue

Update go version in Godeps.json

**What this PR does / why we need it**:
Update go version in Godeps.json to go1.8. Looks like the staging ones were already done, but not the top level one.
```
godeps update -goversion
```

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

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```