Add google_storage_default_object_acl resource (hashicorp#992)

* Storage Default Object ACL resource

* Fixed the doc

* Renamed the resource id. Log change

* Complying with go vet

* Changes for review

* link to default object acl docs in sidebar

docs/r/storage_default_object_acl.html.markdown

@@ -0,0 +1,43 @@
+---
+layout: "google"
+page_title: "Google: google_storage_default_object_acl"
+sidebar_current: "docs-google-storage-default-object-acl"
+description: |-
+  Creates a new default object ACL in Google Cloud Storage.
+---
+
+# google\_storage\_default\_object\_acl
+
+Creates a new default object ACL in Google Cloud Storage service (GCS). For more information see
+[the official documentation](https://cloud.google.com/storage/docs/access-control/lists) 
+and 
+[API](https://cloud.google.com/storage/docs/json_api/v1/defaultObjectAccessControls).
+
+## Example Usage
+
+Example creating a default object ACL on a bucket with one owner, and one reader.
+
+```hcl
+resource "google_storage_bucket" "image-store" {
+  name     = "image-store-bucket"
+  location = "EU"
+}
+
+resource "google_storage_default_object_acl" "image-store-default-acl" {
+  bucket = "${google_storage_bucket.image-store.name}"
+  role_entity = [
+    "OWNER:[email protected]",
+    "READER:group-mygroup",
+  ]
+}
+```
+
+## Argument Reference
+
+* `bucket` - (Required) The name of the bucket it applies to.
+
+* `role_entity` - (Required) List of role/entity pairs in the form `ROLE:entity`. See [GCS Object ACL documentation](https://cloud.google.com/storage/docs/json_api/v1/objectAccessControls) for more details.
+
+## Attributes Reference
+
+Only the arguments listed above are exposed as attributes.

google.erb

@@ -522,6 +522,10 @@
       <a href="/docs/providers/google/r/storage_bucket_object.html">google_storage_bucket_object</a>
       </li>
 
+      <li<%= sidebar_current("docs-google-storage-default-object-acl") %>>
+      <a href="/docs/providers/google/r/storage_default_object_acl.html">google_storage_default_object_acl</a>
+      </li>
+
       <li<%= sidebar_current("docs-google-storage-object-acl") %>>
       <a href="/docs/providers/google/r/storage_object_acl.html">google_storage_object_acl</a>
       </li>