Add a default to Cloud Functions runtime (#3605)

Signed-off-by: Modular Magician <magic-modules@google.com>

google/resource_cloudfunctions_function.go

@@ -185,7 +185,7 @@ func resourceCloudFunctionsFunction() *schema.Resource {
 			"runtime": {
 				Type:     schema.TypeString,
 				Optional: true,
-				Computed: true,
+				Default:  "nodejs6",
 			},
 
 			"service_account_email": {

google/resource_cloudfunctions_function_test.go

@@ -560,6 +560,7 @@ resource "google_pubsub_topic" "sub" {
 
 resource "google_cloudfunctions_function" "function" {
   name                  = "%s"
+  runtime               = "nodejs8"
   available_memory_mb   = 128
   source_archive_bucket = "${google_storage_bucket.bucket.name}"
   source_archive_object = "${google_storage_bucket_object.archive.name}"
@@ -590,6 +591,7 @@ resource "google_storage_bucket_object" "archive" {
 
 resource "google_cloudfunctions_function" "function" {
   name                  = "%s"
+  runtime               = "nodejs6"
   available_memory_mb   = 128
   source_archive_bucket = "${google_storage_bucket.bucket.name}"
   source_archive_object = "${google_storage_bucket_object.archive.name}"

website/docs/r/cloudfunctions_function.html.markdown

@@ -29,6 +29,8 @@ resource "google_storage_bucket_object" "archive" {
 resource "google_cloudfunctions_function" "function" {
   name                  = "function-test"
   description           = "My function"
+  runtime               = "nodejs10"
+
   available_memory_mb   = 128
   source_archive_bucket = "${google_storage_bucket.bucket.name}"
   source_archive_object = "${google_storage_bucket_object.archive.name}"
@@ -51,6 +53,11 @@ The following arguments are supported:
 
 * `name` - (Required) A user-defined name of the function. Function names must be unique globally.
 
+* `runtime` - (Optional) The runtime in which the function is going to run. One
+of `"nodejs6"`, `"nodejs8"`, `"nodejs10"`, `"python37"`, `"go111"`. If empty,
+defaults to `"nodejs6"`. It's recommended that you override the default, as
+`"nodejs6"` is deprecated.
+
 - - -
 
 * `description` - (Optional) Description of the function.
@@ -67,8 +74,6 @@ The following arguments are supported:
 
 * `labels` - (Optional) A set of key/value label pairs to assign to the function.
 
-* `runtime` - (Optional) The runtime in which the function is going to run. If empty, defaults to `"nodejs6"`.
-
 * `service_account_email` - (Optional) If provided, the self-provided service account to run the function with.
 
 * `environment_variables` - (Optional) A set of key/value environment variable pairs to assign to the function.