fix go builds after deleting pkg internal

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

src/shippingservice/Dockerfile

@@ -5,8 +5,10 @@ RUN apk add --no-cache \
 WORKDIR /src/microservices-demo/shippingservice
 # get known dependencies
 RUN go get -d golang.org/x/net/context \
-google.golang.org/grpc \
-google.golang.org/grpc/reflection
+  google.golang.org/grpc \
+  google.golang.org/grpc/reflection \
+  go.opencensus.io/plugin/ocgrpc
+
 COPY . .
 # get other dependencies
 RUN go get -d ./...

src/shippingservice/main.go

@@ -6,8 +6,7 @@ import (
 	"net"
 	"os"
 
-	"microservices-demo/src/internal"
-
+	"go.opencensus.io/plugin/ocgrpc"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/reflection"
@@ -72,7 +71,7 @@ func main() {
 	if err != nil {
 		log.Fatalf("failed to listen: %v", err)
 	}
-	s := grpc.NewServer(internal.DefaultServerOptions()...)
+	s := grpc.NewServer(grpc.StatsHandler(&ocgrpc.ServerHandler{}))
 	pb.RegisterShippingServiceServer(s, &server{})
 	log.Printf("Shipping Service listening on port %s", port)