providers/google: Add documentation for google_iam_policy resource

d/google_iam_policy.html.markdown

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+---
+layout: "google"
+page_title: "Google: google_iam_policy"
+sidebar_current: "docs-google-datasource-iam-policy"
+description: |-
+  Generates an IAM policy that can be referenced by other resources, applying
+  the policy to them.
+---
+
+# google\_iam\_policy
+
+Generates an IAM policy document that may be referenced by and applied to
+other Google Cloud Platform resources, such as the `google_project` resource.
+
+```
+data "google_iam_policy" "admin" {
+  binding {
+    role = "roles/compute.instanceAdmin"
+    members = [
+      "serviceAccount:your-custom-sa@your-project.iam.gserviceaccount.com",
+    ]
+  }
+  binding {
+    role = "roles/storage.objectViewer"
+    members = [
+      "user:evanbrown@google.com",
+    ]
+  }
+}
+```
+
+This data source is used to define IAM policies to apply to othe resources.
+Currently, defining a policy through a datasource and referencing that policy
+from another resource is the only way to apply an IAM policy to a resource.
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `binding` (Required) - A nested configuration block (described below)
+  defining a binding to be included in the policy document. Multiple
+  `binding` arguments are supported.
+
+Each document configuration must have one or more `binding` blocks, which
+each accept the following arguments:
+
+* `role` (Required) - The role/permission that will be granted to the members.
+  See the [IAM Roles](https://cloud.google.com/compute/docs/access/iam) documentation for a complete list of roles.
+* `members` (Required) - An array of users/principals that will be granted
+  the privilege in the `role`. For a human user, prefix the user's e-mail
+  address with `user:` (e.g., `user:evandbrown@gmail.com`). For a service
+  account, prefix the service account e-mail address with `serviceAccount:`
+  (e.g., `serviceAccount:your-service-account@your-project.iam.gserviceaccount.com`).
+
+## Attributes Reference
+
+The following attribute is exported:
+
+* `policy_data` - The above bindings serialized in a format suitable for
+  referencing from a resource that supports IAM.

r/google_project.html.markdown

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+---
+layout: "google"
+page_title: "Google: google_project"
+sidebar_current: "docs-google-project"
+description: |-
+ Allows management of a Google Cloud Platform project. 
+---
+
+# google\_project
+
+Allows management of an existing Google Cloud Platform project, and is
+currently limited to adding or modifying the IAM Policy for the project.
+
+When adding a policy to a project, the policy will be merged with the
+project's existing policy. The policy is always specified in a
+`google_iam_policy` data source and referencd from the project's
+`policy_data` attribute.
+
+## Example Usage
+
+```js
+resource "google_project" "my-project" {
+    id = "your-project-id"
+    policy_data = "${data.google_iam_policy.admin.policy}"
+}
+
+data "google_iam_policy" "admin" {
+  binding {
+    role = "roles/storage.objectViewer"
+    members = [
+      "user:evandbrown@gmail.com",
+    ]
+  }
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `id` - (Required) The project ID.
+    Changing this forces a new project to be referenced.
+
+* `policy` - (Optional) The `google_iam_policy` data source that represents
+    the IAM policy that will be applied to the project. The policy will be
+    merged with any existing policy applied to the project.
+
+    Changing this updates the policy.
+
+    Deleting this removes the policy, but leaves the original project policy
+    intact. If there are overlapping `binding` entries between the original
+    project policy and the data source policy, they will be removed.
+
+## Attributes Reference
+
+In addition to the arguments listed above, the following computed attributes are
+exported:
+
+* `name` - The name of the project.
+
+* `number` - The numeric identifier of the project.