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/ovirt/ovirt_datacenters_facts.py

@@ -19,17 +19,6 @@
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-import traceback
-
-from ansible.module_utils.basic import AnsibleModule
-from ansible.module_utils.ovirt import (
-    check_sdk,
-    create_connection,
-    get_dict_of_struct,
-    ovirt_facts_full_argument_spec,
-)
-
-
 ANSIBLE_METADATA = {'status': ['preview'],
                     'supported_by': 'community',
                     'version': '1.0'}
@@ -72,6 +61,16 @@ ovirt_datacenters:
     type: list
 '''
 
+import traceback
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.ovirt import (
+    check_sdk,
+    create_connection,
+    get_dict_of_struct,
+    ovirt_facts_full_argument_spec,
+)
+
 
 def main():
     argument_spec = ovirt_facts_full_argument_spec(