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/solaris_zone.py

@@ -17,11 +17,6 @@
 # You should have received a copy of the GNU General Public License
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
 
-import sys
-import os
-import platform
-import tempfile
-
 ANSIBLE_METADATA = {'status': ['preview'],
                     'supported_by': 'community',
                     'version': '1.0'}
@@ -159,6 +154,12 @@ EXAMPLES = '''
     attach_options: -u
 '''
 
+import sys
+import os
+import platform
+import tempfile
+
+
 class Zone(object):
     def __init__(self, module):
         self.changed = False