Revert change from PR 1987 (#2153)
Revert change from PR 1987 (#2153)

Automatic merge from submit-queue.

Revert servicecontrol adapter BUILD change from PR 1987

**What this PR does / why we need it**:
Test code shouldn't be compiled into prod code. This reverts change from https://github.com/istio/istio/pull/1987. It appeared it was an accident. 

**Release note**:

```release-note
NONE
```
geeknoid/istio,geeknoid/istio,smawson/istio,smawson/istio,frankbu/istio,geeknoid/istio,geeknoid/istio,frankbu/istio,smawson/istio,smawson/istio,frankbu/istio,istio/istio,geeknoid/istio,smawson/istio,frankbu/istio,smawson/istio,frankbu/istio,istio/istio,istio/istio,istio/istio,frankbu/istio,istio/istio,geeknoid/istio