alts: Change ALTS proto package name (#1886)

credentials/alts/alts.go

@@ -36,7 +36,7 @@ import (
 	"google.golang.org/grpc/credentials/alts/core"
 	"google.golang.org/grpc/credentials/alts/core/handshaker"
 	"google.golang.org/grpc/credentials/alts/core/handshaker/service"
-	altspb "google.golang.org/grpc/credentials/alts/core/proto"
+	altspb "google.golang.org/grpc/credentials/alts/core/proto/grpc_gcp"
 	"google.golang.org/grpc/grpclog"
 )
 

credentials/alts/alts_test.go

@@ -22,7 +22,7 @@ import (
 	"testing"
 
 	"github.com/golang/protobuf/proto"
-	altspb "google.golang.org/grpc/credentials/alts/core/proto"
+	altspb "google.golang.org/grpc/credentials/alts/core/proto/grpc_gcp"
 )
 
 func TestInfoServerName(t *testing.T) {

credentials/alts/core/authinfo/authinfo.go

@@ -21,7 +21,7 @@ package authinfo
 
 import (
 	"google.golang.org/grpc/credentials"
-	altspb "google.golang.org/grpc/credentials/alts/core/proto"
+	altspb "google.golang.org/grpc/credentials/alts/core/proto/grpc_gcp"
 )
 
 var _ credentials.AuthInfo = (*altsAuthInfo)(nil)

credentials/alts/core/authinfo/authinfo_test.go

@@ -22,7 +22,7 @@ import (
 	"reflect"
 	"testing"
 
-	altspb "google.golang.org/grpc/credentials/alts/core/proto"
+	altspb "google.golang.org/grpc/credentials/alts/core/proto/grpc_gcp"
 )
 
 const (

credentials/alts/core/handshaker/handshaker.go

@@ -33,7 +33,7 @@ import (
 	"google.golang.org/grpc/credentials/alts/core"
 	"google.golang.org/grpc/credentials/alts/core/authinfo"
 	"google.golang.org/grpc/credentials/alts/core/conn"
-	altspb "google.golang.org/grpc/credentials/alts/core/proto"
+	altspb "google.golang.org/grpc/credentials/alts/core/proto/grpc_gcp"
 )
 
 const (

credentials/alts/core/handshaker/handshaker_test.go

@@ -26,7 +26,7 @@ import (
 	"golang.org/x/net/context"
 	grpc "google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/alts/core"
-	altspb "google.golang.org/grpc/credentials/alts/core/proto"
+	altspb "google.golang.org/grpc/credentials/alts/core/proto/grpc_gcp"
 	"google.golang.org/grpc/credentials/alts/core/testutil"
 )
 

interop/alts/client/client.go

@@ -17,7 +17,6 @@
  */
 
 // This binary can only run on Google Cloud Platform (GCP).
-
 package main
 
 import (

interop/alts/server/server.go

@@ -17,7 +17,6 @@
  */
 
 // This binary can only run on Google Cloud Platform (GCP).
-
 package main
 
 import (