Upgrade Google driver image to most recent version

christianbundy · shin- · commit 2ec02eca3197 · 2017-08-10T10:27:54.000-07:00
This resolves docker-archive-public#4207, which is caused by dpkg being locked in the previous image. Signed-off-by: Christian Bundy <christianbundy@fraction.io>
diff --git a/drivers/google/google.go b/drivers/google/google.go
@@ -38,7 +38,7 @@ const (
 	defaultZone        = "us-central1-a"
 	defaultUser        = "docker-user"
 	defaultMachineType = "n1-standard-1"
-	defaultImageName   = "ubuntu-os-cloud/global/images/ubuntu-1604-xenial-v20161130"
+	defaultImageName   = "ubuntu-os-cloud/global/images/ubuntu-1604-xenial-v20170721"
 	defaultScopes      = "https://www.googleapis.com/auth/devstorage.read_only,https://www.googleapis.com/auth/logging.write,https://www.googleapis.com/auth/monitoring.write"
 	defaultDiskType    = "pd-standard"
 	defaultDiskSize    = 10
