Update validate-modules (#20932)

* Update validate-modules

* Validates ANSIBLE_METADATA
* Ensures imports happen after documentation vars
* Some pep8 cleanup

* Clean up some left over unneeded code

* Update modules for new module guidelines and validate-modules checks

* Update imports for ec2_vpc_route_table and ec2_vpc_nat_gateway

lib/ansible/modules/cloud/google/gce_snapshot.py

@@ -16,8 +16,9 @@
 # You should have received a copy of the GNU General Public License
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
-from ansible.module_utils.basic import AnsibleModule
-from ansible.module_utils.gce import gce_connect
+ANSIBLE_METADATA = {'status': ['preview'],
+                    'supported_by': 'community',
+                    'version': '1.0'}
 
 DOCUMENTATION = '''
 ---
@@ -129,6 +130,9 @@ snapshots_absent:
     sample: "[disk0-example-snapshot, disk1-example-snapshot]"
 '''
 
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.gce import gce_connect
+
 try:
     from libcloud.compute.types import Provider
     _ = Provider.GCE

lib/ansible/modules/cloud/google/gcpubsub.py

@@ -16,6 +16,10 @@
 # You should have received a copy of the GNU General Public License
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
+ANSIBLE_METADATA = {'status': ['preview'],
+                    'supported_by': 'community',
+                    'version': '1.0'}
+
 DOCUMENTATION = '''
 ---
 module: gcpubsub

lib/ansible/modules/cloud/google/gcpubsub_facts.py

@@ -16,6 +16,10 @@
 # You should have received a copy of the GNU General Public License
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
+ANSIBLE_METADATA = {'status': ['preview'],
+                    'supported_by': 'community',
+                    'version': '1.0'}
+
 DOCUMENTATION = '''
 ---
 module: gcpubsub_facts