Fix paths of gocov

.drone.yml

@@ -12,7 +12,7 @@ pipeline:
       - go get -v -d ./go/src/...
       - go get -v -d -t ./go/src/...
       - go test -v -race ./go/src/...
-      - gocov test ./go/src/... | gocov report
+      - /app/go/deps/bin/gocov test ./go/src/... | gocov report
       - CGO_ENABLED=0 go build -o DIST/flowserver flowserver/cmd/flowserver  
   frontend:
     image: node:6