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/web_infrastructure/letsencrypt.py

@@ -18,12 +18,6 @@
 # You should have received a copy of the GNU General Public License
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
-import binascii
-import copy
-import locale
-import textwrap
-from datetime import datetime
-
 ANSIBLE_METADATA = {'status': ['preview'],
                     'supported_by': 'community',
                     'version': '1.0'}
@@ -168,6 +162,13 @@ authorizations:
         type: dict
 '''
 
+import binascii
+import copy
+import locale
+import textwrap
+from datetime import datetime
+
+
 def nopad_b64(data):
     return base64.urlsafe_b64encode(data).decode('utf8').replace("=", "")