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/system/timezone.py

@@ -18,16 +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 os
-import platform
-import random
-import re
-import string
-
-from ansible.module_utils.basic import AnsibleModule, get_platform
-from ansible.module_utils.six import iteritems
-
-
 ANSIBLE_METADATA = {'status': ['preview'],
                     'supported_by': 'committer',
                     'version': '1.0'}
@@ -89,6 +79,15 @@ EXAMPLES = '''
     name: Asia/Tokyo
 '''
 
+import os
+import platform
+import random
+import re
+import string
+
+from ansible.module_utils.basic import AnsibleModule, get_platform
+from ansible.module_utils.six import iteritems
+
 
 class Timezone(object):
     """This is a generic Timezone manipulation class that is subclassed based on platform.