Clean up deprecations (#504)

* Adjust deprecation versions.

* Remove redirects that are already made in ansible/ansible's ansible_builtin_runtime.yml

* Remove modules that were moved to the google.cloud collection according to ansible/ansible's ansible_builtin_runtime.yml.

* The _info module is in google.cloud.

* The gcp doc_fragment is a copy of the one in google.cloud and is only used by one lookup. Mark as deprecated/internal.

* Remove entries of modules that no longer exist.

* Update ignore.txt.

* Try to fix test.

* Remove debug output.

plugins/doc_fragments/_gcp.py

@@ -0,0 +1,59 @@
+# -*- coding: utf-8 -*-
+
+# Copyright: (c) 2018, Google Inc.
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+
+class ModuleDocFragment(object):
+    # GCP doc fragment.
+    DOCUMENTATION = r'''
+options:
+    project:
+        description:
+            - The Google Cloud Platform project to use.
+        type: str
+    auth_kind:
+        description:
+            - The type of credential used.
+        type: str
+        required: true
+        choices: [ application, machineaccount, serviceaccount ]
+    service_account_contents:
+        description:
+            - The contents of a Service Account JSON file, either in a dictionary or as a JSON string that represents it.
+        type: jsonarg
+    service_account_file:
+        description:
+            - The path of a Service Account JSON file if serviceaccount is selected as type.
+        type: path
+    service_account_email:
+        description:
+            - An optional service account email address if machineaccount is selected
+              and the user does not wish to use the default email.
+        type: str
+    scopes:
+        description:
+            - Array of scopes to be used.
+        type: list
+        elements: str
+    env_type:
+        description:
+            - Specifies which Ansible environment you're running this module within.
+            - This should not be set unless you know what you're doing.
+            - This only alters the User Agent string for any API requests.
+        type: str
+notes:
+  - for authentication, you can set service_account_file using the
+    c(gcp_service_account_file) env variable.
+  - for authentication, you can set service_account_contents using the
+    c(GCP_SERVICE_ACCOUNT_CONTENTS) env variable.
+  - For authentication, you can set service_account_email using the
+    C(GCP_SERVICE_ACCOUNT_EMAIL) env variable.
+  - For authentication, you can set auth_kind using the C(GCP_AUTH_KIND) env
+    variable.
+  - For authentication, you can set scopes using the C(GCP_SCOPES) env variable.
+  - Environment variables values will only be used if the playbook values are
+    not set.
+  - The I(service_account_email) and I(service_account_file) options are
+    mutually exclusive.
+'''